title: Placebo response in the evaluation of hypnotic drugs.
mesh_terms: D002986:Clinical Trials as Topic; D006801:Humans; D008297:Male; D008702:Methaqualone / Q000627:therapeutic use*; D010424:Pentobarbital / Q000627:therapeutic use*; D010919:Placebos; D012890:Sleep / Q000187:drug effects; D007319:Sleep Initiation and Maintenance Disorders / Q000188:drug therapy*; D013223:Statistics as Topic; D013997:Time Factors
chemical_list: D010919:Placebos; D008702:Methaqualone; D010424:Pentobarbital