title: Reported coital activity of men and levels of plasma testosterone.
mesh_terms: D000328:Adult; D003075:Coitus; D005058:Eunuchism; D006801:Humans; D007713:Klinefelter Syndrome; D008297:Male; D012728:Sex Chromatin; D012725:Sexual Behavior; D013739:Testosterone / Q000097:blood*; D014646:Varicocele
chemical_list: D013739:Testosterone