title: Effect of constant light on nychthemeral variations in serum testosterone in male Macaca radiata.
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D000882:Haplorhini; D008027:Light; D008255:Macaca radiata; D008297:Male; D013739:Testosterone / Q000097:blood*; D013997:Time Factors
chemical_list: D013739:Testosterone