Toward a re-definition of subthreshold bipolarity: epidemiology and proposed criteria for bipolar-II, minor bipolar disorders and hypomania

Background: The boundaries of bipolarity have been expanding over the past decade. Using a well characterized epidemiologic cohort, in this paper our objectives were: (1) to test the diagnostic criteria of DSM-IV hypomania, (2) to develop and validate criteria for the definition of softer expression...

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