title: [Studies on preoperative anxiety and sleep disorders].
mesh_terms: D001007:Anxiety / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D003975:Diazepam / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008297:Male; D010424:Pentobarbital / Q000627:therapeutic use*; D010919:Placebos; D011300:Preoperative Care; D012893:Sleep Wake Disorders / Q000188:drug therapy*
chemical_list: D010919:Placebos; D010424:Pentobarbital; D003975:Diazepam