Method Twenty six drug-naïve currently depressed (moderate/severe) patients with no previous treatment were recruited for the study. The baseline study included a group of 18 healthy controls. The patients were randomised into psychotherapy and waiting-list control groups. For controls, psychotherapy was started after a 6-month waiting period. [123I] nor-B-CIT SPET imaging was performed at baseline and after 12 months of psychotherapy. For the controls, additional imaging was performed after the 6-month waiting period.