title: A 3-year study of an annual rhythm in plasma androgen levels in male rhesus monkeys (Macaca mulatta) in a constant laboratory environment.
mesh_terms: D000818:Animals; D004780:Environment, Controlled; D000882:Haplorhini; D008251:Macaca / Q000097:blood*; D008253:Macaca mulatta / Q000097:blood*; D008297:Male; D010507:Periodicity; D012621:Seasons; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone