title: Selection biases in semen study?
authors.forename: N E
authors.initials: NE
authors.lastname: Skakkebaek
authors.forename: A
authors.initials: A
authors.lastname: Giwercman
authors.forename: T K
authors.initials: TK
authors.lastname: Jensen
authors.forename: E
authors.initials: E
authors.lastname: Carlsen
authors.forename: N
authors.initials: N
authors.lastname: Jørgensen
authors.forename: N
authors.initials: N
authors.lastname: Keiding
mesh_terms: D000328:Adult; D003718:Denmark; D006801:Humans; D008297:Male; D010560:Personnel Selection; D012661:Semen / Q000502:physiology*; D013076:Sperm Count