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Journal of Clinical Epidemiology|January 1, 1990
Haematologic parameters and pregnancy outcome. A prospective cohort study in the third trimesterJ A Knottnerus, L R Delgado, P G Knipschild, et al.Theoretical Medicine|March 1, 1989
Symptoms and selection bias: the influence of selection towards specialist care on the relationship between symptoms and diagnosesJ A Knottnerus, P G Knipschild, F SturmansQuality Assurance in Health Care : the Official Journal of the International Society for Quality Assurance in Health Care|June 1, 1992
Reactions of doctors to various forms of feedback designed to improve the sampling quality of cervical smearsF Buntinx, J A Knottnerus, H F Crebolder, et al.European Journal of Cancer Prevention : the Official Journal of the European Cancer Prevention Organisation (ECP)|April 1, 1995
Long-term effect of feedback and peer comparison on the sampling quality of cervical smears--a randomized controlled trialF Buntinx, J A Knottnerus, G G Essed, et al.European Journal of Obstetrics, Gynecology, and Reproductive Biology|December 13, 1991
Geographical variations in the sampling quality of cervical smearsF Buntinx, G G Essed, H F Crebolder, et al.Canadian Family Physician Medecin De Famille Canadien|January 27, 2011
Unexplained fatigue and hemoglobin: a primary care studyJ A Knottnerus, P G Knipschild, J W Wersch, et al.Journal of Clinical Epidemiology|May 3, 2005
The validity and ethics of giving placebo in a randomized nonpharmacologic trial was evaluatedM G Spigt, P G Knipschild, C P van Schayck, et al.European Journal of Cancer Prevention : the Official Journal of the European Cancer Prevention Organisation (ECP)|January 1, 1994
The effect of different sampling devices on the presence of endocervical cells in cervical smears. A systematic literature reviewF Buntinx, J A Knottnerus, J André, et al.Acta Cytologica|January 1, 1991
Comparison of Cytobrush sampling, spatula sampling and combined Cytobrush-spatula sampling of the uterine cervixF Buntinx, M E Boon, S Beck, et al.Journal of Clinical Epidemiology|April 1, 1993
Interobserver variation in the assessment of the sampling quality of cervical smearsF Buntinx, H J Schouten, J A Knottnerus, et al.Pageof 83