title: Reining in diversity--at what risk?
authors.affiliation: Institute of Reproductive Medicine of the University Hospitals, WHO Collaborating Centre for Research in Male Reproduction, Münster, Germany.
authors.forename: Trevor G
authors.initials: TG
authors.lastname: Cooper
authors.affiliation: Institute of Reproductive Medicine of the University Hospitals, WHO Collaborating Centre for Research in Male Reproduction, Münster, Germany.
authors.forename: Eberhard
authors.initials: E
authors.lastname: Nieschlag
mesh_terms: D053713:Azoospermia / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D016014:Linear Models; D008297:Male; D009845:Oligospermia / Q000175:diagnosis / Q000473:pathology*; D012044:Regression Analysis; D012661:Semen / Q000166:cytology*; D013076:Sperm Count / Q000592:standards*; D009626:Terminology as Topic; D014944:World Health Organization