title: Age differences in serum androgen levels in normal adult males.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000735:Androstenedione / Q000097:blood*; D006801:Humans; D008875:Middle Aged; D012016:Reference Values; D012738:Sex Hormone-Binding Globulin / Q000097:blood*; D013739:Testosterone / Q000097:blood*
chemical_list: D012738:Sex Hormone-Binding Globulin; D013739:Testosterone; D000735:Androstenedione