title: Plasma testosterone levels, depression, sexuality, and age.
mesh_terms: D000367:Age Factors; D003866:Depressive Disorder / Q000097:blood*; D006801:Humans; D007989:Libido / Q000502:physiology*; D008297:Male; D012725:Sexual Behavior / Q000502:physiology; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone