KellerMBMcCulloughJPKleinDNArnowBDunnerDLGelenbergAJMarkowitzJCNemeroffCBRussellJMThaseMETrivediMHZajeckaJ.A comparison of nefazodone, the cognitive behavioural-analysis system of psychotherapy, and their combination for the treatment of chronic-depression Treatment for Chronic Depression: Cognitive Behavioral Analysis System of Psychotherapy. New Eng J Med2000; 342:1460–70.