title: Plasma testosterone levels in cluster headache preliminary results.
mesh_terms: D000328:Adult; D000368:Aged; D006261:Headache / Q000097:blood*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012075:Remission, Spontaneous; D013739:Testosterone / Q000097:blood*; D014653:Vascular Headaches / Q000097:blood*
chemical_list: D013739:Testosterone