Michael Schemper
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Computer Science
Michael Schemper's Degrees
- Masters Computer Science Stanford University
- Bachelors Computer Science University of California, Berkeley
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(Suggest an Edit or Addition)Michael Schemper's Published Works
Number of citations in a given year to any of this author's works
Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author
Published Works
- A note on quantifying follow-up in studies of failure time. (1996) (2007)
- A solution to the problem of separation in logistic regression (2002) (1604)
- Predictors of outcome in severe, asymptomatic aortic stenosis. (2000) (1020)
- Outcome of Watchful Waiting in Asymptomatic Severe Mitral Regurgitation (2006) (492)
- Natural History of Very Severe Aortic Stenosis (2010) (456)
- Statins but Not Angiotensin-Converting Enzyme Inhibitors Delay Progression of Aortic Stenosis (2004) (429)
- Alterations in nocturnal serum melatonin levels in humans with growth and aging. (1988) (413)
- Mild and moderate aortic stenosis. Natural history and risk stratification by echocardiography. (2003) (405)
- Explained variation for logistic regression. (1996) (342)
- Metabolic disorders in severe abdominal sepsis: glutamine deficiency in skeletal muscle. (1982) (315)
- A Solution to the Problem of Monotone Likelihood in Cox Regression (2001) (282)
- Medical conditions increasing the risk of chronic thromboembolic pulmonary hypertension (2005) (272)
- The estimation of average hazard ratios by weighted Cox regression (2009) (223)
- Predictive Accuracy and Explained Variation in Cox Regression (2000) (223)
- Explained variation in survival analysis. (1996) (211)
- Cox Analysis of Survival Data with Non‐Proportional Hazard Functions (1992) (192)
- Immunocytochemical localization of estrogen and progesterone receptor and prognosis in human primary breast cancer. (1990) (184)
- Statistical evaluation of epiluminescence microscopy criteria for melanocytic pigmented skin lesions. (1993) (145)
- Predictive accuracy and explained variation (2003) (145)
- EWS/FLI-1 antagonists induce growth inhibition of Ewing tumor cells in vitro. (1996) (141)
- The explained variation in proportional hazards regression (1990) (141)
- Narrowband UV-B phototherapy vs photochemotherapy in the treatment of chronic plaque-type psoriasis: a paired comparison study. (1999) (136)
- Computed tomography-based evaluation of template (NobelGuide™)-guided implant positions: a prospective radiological study. (2011) (136)
- Antibiotic treatment in preterm premature rupture of membranes and neonatal morbidity: a metaanalysis. (1996) (133)
- Comparing Cox and parametric models in clinical studies (2003) (133)
- Surgical treatment of distant metastases in differentiated thyroid cancer: indication and results. (1986) (131)
- Serum melatonin in central precocious puberty is lower than in age-matched prepubertal children. (1991) (126)
- Alteration of Nipple and Areola Sensitivity by Reduction Mammaplasty: A Prospective Comparison of Five Techniques (2005) (123)
- Endovascular Stent Grafting Versus Open Surgical Operation in Patients With Infrarenal Aortic Aneurysms: A Propensity Score–Adjusted Analysis (2002) (119)
- High-Density Lipoprotein and the Risk of Recurrent Venous Thromboembolism (2007) (115)
- Gene expression profiling: does it add predictive accuracy to clinical characteristics in cancer prognosis? (2007) (109)
- Treatment of pruritus in chronic liver disease with the 5‐hydroxytryptamine receptor type 3 antagonist ondansetron: a randomized, placebo‐controlled, double‐blind cross‐over trial (1998) (107)
- A meta‐analysis of low dose aspirin for the prevention of intrauterine growth retardation (1997) (105)
- Topical versus peribulbar anesthesia in clear corneal cataract surgery (1996) (95)
- A decade of oral anticoagulant treatment to maintain autologous vein grafts for femoropopliteal atherosclerosis. (1992) (88)
- A pharmacological dose of melatonin increases PRL levels in males without altering those of GH, LH, FSH, TSH, testosterone or cortisol. (1987) (87)
- Outcome of combined stenotic and regurgitant aortic valve disease. (2013) (85)
- Estrogen receptor analysis on biopsies and fine-needle aspirates from human breast carcinoma. Correlation of biochemical and immunohistochemical methods using monoclonal antireceptor antibodies. (1986) (83)
- Histopathologic characterization of human breast cancer in correlation with estrogen receptor status. A comparison of immunocytochemical and biochemical analysis (1988) (79)
- Shouldice is superior to Bassini inguinal herniorrhaphy. (1994) (78)
- Prognostic factors for survival in Stage I epithelial ovarian carcinoma (1990) (75)
- Skin tumors in photochemotherapy for psoriasis: a single-center follow-up of 496 patients. (1996) (73)
- INFLUENCE OF POSTOPERATIVE ANTICOAGULANT TREATMENT ON PATIENT SURVIVAL AFTER FEMOROPOPLITEAL VEIN BYPASS SURGERY (1988) (69)
- Weighted Cox Regression Using the R Package coxphw (2018) (66)
- CA 125 as an independent prognostic factor for survival in patients with epithelial ovarian cancer. (1989) (66)
- The relative importance of prognostic factors in studies of survival. (1991) (65)
- New Residuals for Cox Regression and Their Application to Outlier Screening (1999) (63)
- Efficient evaluation of treatment effects in the presence of missing covariate values. (1990) (59)
- Logistic regression modeling and the number of events per variable: selection bias dominates. (2011) (56)
- Exact Log‐Rank Tests for Unequal Follow‐Up (2003) (54)
- The influence of anticoagulant treatment on the probability of function in femoropopliteal vein bypass surgery: analysis of a clinical series (1970 to 1985) and interim evaluation of a controlled clinical trial. (1987) (54)
- Hypertrophy of the breast: a problem of beauty or health? (2007) (53)
- Resistance of nitrogen metabolism to growth hormone treatment in the early phase after injury of patients with multiple injuries. (1995) (51)
- Parameters influencing FVIII pharmacokinetics in patients with severe and moderate haemophilia A (2015) (51)
- [Validation study of the Mannheim Peritonitis Index]. (1988) (50)
- Comparing the importance of prognostic factors in Cox and logistic regression using SAS (2003) (50)
- ADJUNCTIVE ANTIBIOTIC TREATMENT IN PRETERM LABOR AND NEONATAL MORBIDITY: A META‐ANALYSIS (1996) (49)
- Asymptomatic Severe Aortic Stenosis in the Elderly. (2017) (49)
- Long-term treatment, tolerability, and survival with sub-cutaneous treprostinil for severe pulmonary hypertension. (2012) (48)
- Antiplatelet Treatment Prolongs Survival After Carotid Bifurcation Endarterectomy: Analysis of the Clinical Series Followed by a Controlled Trial (1990) (47)
- Liver amino acids in sepsis. (1985) (42)
- Obliterations of the proximal subclavian artery: to bypass or to anastomose? (1991) (42)
- Influence of anticoagulant treatment in preventing graft occlusion following saphenous vein bypass for femoropopliteal occlusive disease (1986) (41)
- The relative importance of prognostic factors in studies of survival (1993) (41)
- Computing measures of explained variation for logistic regression models. (1999) (41)
- Simultaneous and Sequential Determinations of Steroid Hormone Receptors in Human Breast Cancer: Influence of Intervening Therapy (1985) (39)
- Austrian height and body proportion references for children aged 4 to under 19 years (2013) (39)
- Parsimonious analysis of time‐dependent effects in the Cox model (2007) (38)
- Estimating the correlation of bivariate failure times under censoring (2013) (38)
- Oestrogen and progesterone receptor content as a prognostic factor in advanced epithelial ovarian carcinoma (1990) (38)
- Testicular cancer: prognostic implications of vascular invasion. (1987) (38)
- hVps37A Status Affects Prognosis and Cetuximab Sensitivity in Ovarian Cancer (2011) (38)
- A permutation test for inference in logistic regression with small‐ and moderate‐sized data sets by D. M. Potter, Statistics in Medicine 2005; 24:693–708 (2006) (37)
- Dacron versus polytetrafluoroethylene for Y-aortic bifurcation grafts: a six-year prospective, randomized trial. (1992) (34)
- Weight and body mass index (BMI): current data for Austrian boys and girls aged 4 to under 19 years (2015) (34)
- Hemodynamic effects of prolonged abdominal insufflation for laparoscopic procedures. (1995) (33)
- Non-parametric analysis of treatment-covariate interaction in the presence of censoring. (1988) (32)
- Gene selection in microarray survival studies under possibly non-proportional hazards (2010) (32)
- Probability imputation revisited for prognostic factor studies. (1997) (29)
- FVIII-binding IgG modulates FVIII half-life in patients with severe and moderate hemophilia A without inhibitors. (2016) (29)
- Further results on the explained variation in proportional hazards regression (1992) (29)
- Spontaneous growth in turner syndrome: Evidence for a minor pubertal growth spurt (1992) (29)
- [The value of 2 distinct prognosis scores in patients with peritonitis. The Mannheim Peritonitis Index versus the Apache II score]. (1990) (29)
- The effect of adjuvant chemotherapy in gastric carcinoma is dependent on tumor histology: 5-year results of a prospective randomized trial. (1988) (29)
- Comparison of cooling and EMLA to reduce the burning pain during capsaicin 8% patch application: A randomized, double-blind, placebo-controlled study (2013) (28)
- Influence of Tumoral Microvessel Density on the Recurrence-Free Survival in Human Breast Cancer: Preliminary Results (1994) (28)
- Androgen receptors, serum androgen levels and survival of breast cancer patients (2006) (28)
- Role of a heart valve clinic programme in the management of patients with aortic stenosis (2017) (27)
- Prediction of malignant hyperthermia susceptibility: statistical evaluation of clinical signs. (1990) (27)
- The application of Firth's procedure to Cox and logistic regression (2001) (26)
- Prognostic factors for survival in stage I epithelial ovarian carcinoma. (1990) (24)
- Prognostic significance of endotoxin determination in patients with severe intraabdominal infection. (1990) (23)
- Comparison of prognostic indices for burns and assessment of their accuracy. (1992) (22)
- Primary hepatic cancer--the role of limited resection and total hepatectomy with orthotopic liver replacement. (1988) (22)
- “Laying on of hands” improves well-being in patients with advanced cancer (2007) (22)
- A new approach to estimate correlation coefficients in the presence of censoring and proportional hazards (1997) (21)
- Effect of adjuvant chemo‐ or immunotherapy on the prognosis of colorectal cancer operated for cure (1985) (21)
- A nonparametric k‐sample test for data defined by intervals (1983) (20)
- HER-2 oncogene amplification and overall survival of breast carcinoma patients. (1990) (20)
- Explained Variation for Logistic Regression - Small Sample Adjustments, Confidence Intervals and Predictive Precision (2002) (19)
- Long-term treatment of peptic esophageal stenosis with dilatation and cimetidine: factors influencing clinical result. (1985) (18)
- Lack of impact of platinum dose intensity on the outcome of ovarian cancer patients: 10-year results of a prospective randomised phase III study comparing carboplatin–cisplatin with cyclophosphamide–cisplatin (2003) (17)
- The place of profundaplasty in the surgical treatment of superficial femoral artery occlusion. (1987) (17)
- Postoperative infections in colonic surgery after enteral bacitracin-neomycin-clindamycin or parenteral mezlocillin-oxacillin prophylaxis. (1984) (16)
- [Psychosocial risk factors for Alzheimer's disease]. (1999) (15)
- Blockade of endothelium-derived relaxing factor synthesis with NG-nitro-L-arginine methyl ester leads to enhanced venous reactivity in vivo. (1992) (14)
- Analyses of associations with censored data by generalized Mantel and Breslow tests and generalized Kendall correlation coefficients (1984) (14)
- Vein bypass surgery for femoro-popliteal arteriosclerosis: influence of different risk factors on patient survival and the importance of anticoagulant treatment. (1988) (14)
- Self-tonometry with the Ocuton S: evaluation of accuracy in glaucoma patients. (2004) (14)
- Non-parametric partial association revisited (1991) (14)
- Rectal cancer: factors influencing the development of local recurrence after radical anterior resection (1988) (13)
- Extra-anatomic femoro-femoral crossover bypass (FF) vs. unilateral orthotopic ilio-femoral bypass (IF): an attempt to compare results based on data matching. (1991) (12)
- A survey of permutation tests for censored survival data (1984) (12)
- Prolonged preoperative prismatic treatment in alternating convergent squint (1994) (11)
- [The value of adjuvant irradiation in patients with cervical carcinoma in histopathological stage Ib and negative lymph nodes]. (1991) (11)
- Nonparametric estimation of variance, skewness and kurtosis of the distribution of a statistic by jackknife and bootstrap techniques (1987) (11)
- Natural history and risk stratification by echocardiography (2004) (11)
- Statistical controversies in clinical research: the importance of importance. (2016) (10)
- Lack of impact of platinum dose intensity on the outcome of ovarian cancer patients. 10-year results of a prospective randomised phase III study comparing carboplatin-cisplatin with cyclophosphamide-cisplatin. (2004) (10)
- [Prognostic factors for survival in perforated colonic diverticulitis]. (1989) (9)
- Expression of p43 in breast cancer tissue, correlation with prognostic parameters. (1992) (9)
- Aneuploidy fraction but not DNA index is important for the prognosis of patients with stage I and II breast cancer--10-year results. (1993) (9)
- Prognostic significance of steroid hormone receptors and histopathological characterization of human breast cancer (2004) (9)
- A generalized Friedman test for data defined by intervals (1984) (8)
- Results of a rigorous follow-up system in colorectal cancer (1988) (8)
- [Oestrogen receptors and prognosis in breast cancer]. (1980) (8)
- [Liver resection of hematogenous and infiltrating metastases]. (1986) (8)
- Cyclosporin-A-induced hair growth in human renal allograft recipients and alopecia areata (2004) (8)
- Effectiveness of postoperative adjuvant therapy with cytotoxic chemotherapy (cytosine arabinoside, mitomycin C, 5-fluorouracil) or immunotherapy (neuraminidase-modified allogeneic cells) in the prevention of recurrence of Duke's B and C colon cancer. (1981) (8)
- [Therapeutic and prognostic results of a prospective multicenter ovarian cancer study of FIGO stages I and II]. (1987) (8)
- Improved renal graft function after prostacyclin pretreatment. (1987) (7)
- Non-parametric estimation of relative risk in survival and associated tests (2015) (7)
- Acetylsalicylic acid in combination with dihydroergotamine for preventing thromboembolism. (1982) (7)
- Multivariable model‐building: A pragmatic approach to regression analysis based on fractional polynomials for modelling continuous variables. Patrick Royston and Willi Sauerbrei, Wiley, Chichester, 2008. No. of pages: 322. Price: $130.00. ISBN: 978‐0‐470‐02842‐1 (2009) (7)
- Oestrogen and progesterone receptor content as a prognostic factor in advanced epithelial ovarian carcinoma (1991) (6)
- Significant survival benefit of node-negative breast cancer patients treated with adjuvant chemotherapy: seven-year results. (1989) (5)
- [Surgical treatment of medullary thyroid carcinoma (author's transl)]. (2008) (5)
- Diagnostic efficacy of multiple tumor markers in lung cancer (1988) (5)
- The use of the Haemoccult test for detection of blood in gastric aspirates. (1983) (5)
- [Evaluation of shoulder function after removal of the latissimus dorsi muscle for surgical flap]. (1990) (5)
- Postoperative assessment of below-knee bypass grafts. (1984) (5)
- Amendments and Corrections: The Explained Variation in Proportional Hazards Regression (1994) (5)
- [Emergency interventions in gastroduodenal ulcer]. (1990) (5)
- [Results of the first Austrian multicenter ovarian cancer study: prospective randomized comparison of sequential chemotherapy (adriamycin/cisplatin--vincristine/cyclophosphamide--methotrexate) with 2 standard protocols (adriamycin/cyclophosphamide or adriamycin/cisplatin) in stage III and IV patient (1985) (5)
- [Randomization for controlled therapeutic trials]. (1982) (5)
- A generalized wilcoxon test for data defined by intervals (1984) (5)
- [Vascular surgery--chronic vascular occlusive disease of the lower extremity: a main point of surgical research]. (1983) (4)
- 2118 Continuous hyperfractionated accelerated radiation therapy with/without mitomycin C in head and neck cancer: Initial results from an on-going randomized trial (1996) (4)
- Generalized Rank Transformations for Tests of Survival (1991) (4)
- Prophylactic measures against infections in the implantation of head prostheses of the hip (1989) (4)
- One- and Two-Sample Tests of Kendall's τ (1987) (4)
- Aorto-Y-bifurcation graft: Dacron versus PTFE. Preliminary results of a randomized prospective study. (1988) (4)
- Quantifying degrees of necessity and of sufficiency in cause‐effect relationships with dichotomous and survival outcomes (2019) (3)
- Differences in anti-Fab antibodies in adult and late onset rheumatoid arthritis (2004) (3)
- [Breast cancer in Austria: epidemiology and risk factors]. (1986) (3)
- [Androgen receptors in primary breast carcinoma. Relation to prognostic factors in comparison with estrogen and progesterone receptors]. (2008) (3)
- [Autologous venous bypass in the therapy of arterial occlusive disease of the femoropopliteal area: long-term results]. (1986) (3)
- Placental isoferritin associated p43 antigen correlates with features of high differentiation in breast cancer (2005) (3)
- General Derivation of Intraclass Correlation Coefficients (1986) (3)
- Explained variation in shared frailty models (2018) (3)
- [Role of postoperative anticoagulant treatment following femoro-popliteal venous bypass. Interim evaluation of a controlled clinical study]. (1987) (2)
- 33 Overfit in logistic regression (1997) (2)
- [The role of intestinal resection in primary surgery of ovarian carcinoma]. (1991) (2)
- Evaluation of diagnostic and treatment approaches towards acute dyspnea in a palliative care setting among medical students at the University of Vienna (2011) (2)
- Predictors of early reangiography within 30 days after coronary stenting. (2003) (2)
- Documentation and Statistics (1989) (2)
- A Generalization of the Intraclass Tau Correlation for Tied and Censored Data (1984) (2)
- [Incidence and regional distribution of colorectal cancers in Austria]. (1985) (2)
- [Identification of high risk patients with severe, but asymptomatic aortic stenosis]. (2001) (2)
- Results of a controlled study of CO2 laser vs conventional technique in breast cancer (1993) (2)
- [Dilatation treatment of achalasia as initial therapy. Results of a prospective study]. (1996) (2)
- [Statistical standards for clinical long-term studies]. (1984) (2)
- Generalisation of the Kaplan–Meier Estimator for Standardised Processes (1991) (2)
- A Closed‐form Jackknife Solution for the Behrens‐Fisher Problem (1989) (2)
- Exact test procedures for generalized Kendall correlation coefficients (1984) (2)
- [Effect of risk factors on early and long-term regional results following kidney transplantation]. (1987) (2)
- [The value of the "vascular invasion" factor for prognosis of breast cancer]. (1994) (2)
- [Causes of death in patients with pacemakers - with respect to the indication for implantation]. (1984) (1)
- Effect of adjuvant chemo- or immunotherapy on the prognosis of colorectal cancer operated for cure (1986) (1)
- [Stimulation of collagen synthesis in rabbit tendons by continuous extension stress]. (1988) (1)
- Ranking of the Factor Vascular Invasion for the Prognosis of Carcinoma of the Breast (1994) (1)
- Changes of hormone serum levels during UVA and UVB irradiation. (1987) (1)
- THE ONSET OF ASPIRATION SYNDROME - A PARASYMPATHETIC REFLEX RESPONSE? (1981) (1)
- Die Perforationsperitonitis (2007) (1)
- Vessel Invasion Predicts Early Recurrence in Breast Cancer: Preliminary Results (1993) (1)
- On bootstrap confidence limits for possibly skew distributed statistics (1987) (1)
- The value of prognostic parameters for the stratification of advanced breast cancer patients (2004) (1)
- Simple Nonparametric Inference for Monotonic Processes (1991) (1)
- [Steroid hormone receptors in mammary carcinoma. Immunohistochemical detection and prognostic significance]. (1991) (1)
- [Problems arising in connection with surgical management of renovascular hypertension (author's transl)]. (1981) (1)
- [Consequences of after-care in colorectal cancer]. (1986) (1)
- Renovascular Hypertension—Renal Artery Stenosis: Results of Sixty-Five Consecutive Reconstructions (1982) (1)
- The prognostic value of plasmaproteins in patients with abdominal sepsis. (1989) (1)
- [Prognostic significance of tumor grading in breast cancer]. (1985) (1)
- [Adjuvant chemotherapy in patients with radical resection of stomach cancer: 5-year results of a prospective randomized study]. (1986) (1)
- [Various amounts of estrogen receptors in breast neoplasms]. (1979) (1)
- Nicotine Abuse as a Prognostic Factor in Stage Ib Cervical Carcinoma (1992) (1)
- [Acetylsalicylic acid after iliac-femoro-popliteal interventions?]. (1991) (1)
- [Prevention of infection in implantation of femur head prostheses]. (1989) (1)
- Degrees of necessity and of sufficiency: Further results and extensions, with an application to covid‐19 mortality in Austria (2021) (1)
- [Comparison of immunohistochemical and biochemical analysis of estrogen receptors in breast carcinoma and correlations with the histological tumor classification]. (1986) (0)
- EXPLAINED VARIATION I N SURVIVAL ANALYSIS (2006) (0)
- [Rectal cancer: prognostically relevant factors for the development of local recurrence following radical anterior resection]. (1990) (0)
- AGI-DEPENDENT ALTERATION OF NOCTURNAL SERUM MELATIONIN IS A FUNCTION ON INCREASING BODY SIZE IN CHILDREN AND ADOLESCENTS (1988) (0)
- Occluded Infrainguinal Vein Bypass Grafts. Are Secondary Alloplastic Procedures Worthwhile? (1991) (0)
- [Tumor histology and steroid receptors in breast carcinoma]. (1981) (0)
- [Conservative treatment of peptic esophageal stenoses. Results of a prospective long-term study]. (1986) (0)
- [Malnutrition and postoperative complication rate in cancer patients (author's transl)]. (1982) (0)
- Contents, Vol. 16, 1993 (1983) (0)
- [Long-term results following surgical therapy of leg-pelvic venous thrombosis]. (1987) (0)
- [Does anticoagulant treatment modify patient survival following femoropopliteocrural venous bypass operations?]. (1987) (0)
- [Topical differences in estrogen receptor content of primary breast cancer]. (1979) (0)
- Book review: Fundamentals of Biostatistical Inference. Chap T. Le, Marcel Dekker Inc., New York, 1992. No. of pages: v+254. Price: $55. ISBN 0‐8247‐8674‐2 (1998) (0)
- [Prognostic factors in the drug therapy of metastasizing breast cancer]. (1979) (0)
- Subject index for 1993 (1993) (0)
- David Draper: Model Mis-specification Bias and Model Uncertainty: Bayesian Solutions……………………………………………………………5 Estimation in Cox Regression Revisited……………………………………7 Georg Ferber: the Maximum Mean Difference -statistical Problems in Assessing Cardiac Safety……………………………………..11 Klaas Prins: Modeling and S (2007) (0)
- The impact of "laying on of hands" on well being in patients with advanced cancer. (2006) (0)
- Results of a four-year prospective randomised study of operable breast cancer (1986) (0)
- Prostacyclin to improve early function in clinical renal transplantation. (1987) (0)
- [Prognostic factors of radically operated stage Ib cervix cancer]. (1992) (0)
- [Stomach cancer in Austria. Epidemiology and pathogenesis]. (1987) (0)
- [The significance of prognostic factors in patients with endometrial cancer and lymph node excision]. (1991) (0)
- [Multiple transplantation of the kidney as a risk factor]. (1988) (0)
- Contents, Vol. 31, Supplement 2, 1991 (1991) (0)
- [The influence of prostacyclin on gastrointestinal blood flow during hypovolemic shock (author's transl)]. (1980) (0)
- [Surgical therapy of breast cancer: to operate radically or to preserve the breast?]. (1984) (0)
- Bifurkationsprothese: Dacron versus Teflon (PTFE) (2007) (0)
- [Choice of anaesthesia technique in thoracic endoscopic sympathectomy (author's transl)]. (1980) (0)
- [Status and tasks of biometry in clinical and experimental research]. (1986) (0)
- Prospective Randomized Trial of Sequential Alternating Chemotherapy in Advanced Ovarian Carcinoma (1992) (0)
- [Prevention of thromboembolism in para-articular femoral fractures of the hip--results of a prospective randomized study of heparin-DHE and ASS-DHE]. (1990) (0)
- [The PTFE plastic prosthesis as an arterial replacement: experiences over a 5-year period]. (1984) (0)
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