title: Chronic insomnia.
mesh_terms: D002908:Chronic Disease; D003863:Depression / Q000188:drug therapy; D006801:Humans; D006993:Hypnotics and Sedatives / Q000627:therapeutic use; D008019:Life Style; D007319:Sleep Initiation and Maintenance Disorders / Q000523:psychology / Q000628:therapy*; D013315:Stress, Psychological
chemical_list: D006993:Hypnotics and Sedatives