title: Pitfalls in the design of clinical trials for interstitial cystitis.
authors.affiliation: Department of Biostatistics and Epidemiology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-6021, USA.
authors.forename: Kathleen Joy
authors.initials: KJ
authors.lastname: Propert
authors.forename: Christopher
authors.initials: C
authors.lastname: Payne
authors.forename: John W
authors.initials: JW
authors.lastname: Kusek
authors.forename: Leroy M
authors.initials: LM
authors.lastname: Nyberg
mesh_terms: D015986:Confounding Factors, Epidemiologic; D018856:Cystitis, Interstitial / Q000628:therapy*; D003625:Data Collection / Q000592:standards; D003627:Data Interpretation, Statistical; D006801:Humans; D017063:Outcome Assessment, Health Care; D018579:Patient Selection; D015990:Placebo Effect; D016032:Randomized Controlled Trials as Topic / Q000379:methods; D018401:Sample Size; D012720:Severity of Illness Index