title: Chronic and recurrent affective disorders: incidence, course, and influencing factors.
mesh_terms: D001714:Bipolar Disorder / Q000453:epidemiology*; D002908:Chronic Disease; D003866:Depressive Disorder / Q000453:epidemiology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D012008:Recurrence