title: Impotence and sclerodermic syndromes.
mesh_terms: D000328:Adult; D002940:Circadian Rhythm; D007172:Erectile Dysfunction / Q000097:blood / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D012595:Scleroderma, Systemic / Q000097:blood / Q000150:complications*; D013739:Testosterone / Q000097:blood
chemical_list: D013739:Testosterone