title: Re: Single or Double Semen Samples: The Dilemma in Epidemiological Studies on Semen Quality.
authors.forename: Craig
authors.initials: C
authors.lastname: Niederberger
mesh_terms: D016021:Epidemiologic Studies; D006801:Humans; D008297:Male; D012661:Semen; D055101:Semen Analysis; D013081:Sperm Motility