title: Melatonin and sleep disorders: no better than placebo.
mesh_terms: D006801:Humans; D008550:Melatonin / Q000627:therapeutic use*; D015201:Meta-Analysis as Topic; D020178:Sleep Disorders, Circadian Rhythm / Q000188:drug therapy*; D012893:Sleep Wake Disorders / Q000188:drug therapy*
chemical_list: D008550:Melatonin