title: The state of knowledge of chronic depression.
authors.affiliation: Department of Psychiatry, Arizona Health Sciences Center, Tucson, Ariz, USA.
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Gelenberg
authors.forename: James H
authors.initials: JH
authors.lastname: Kocsis
authors.forename: James P
authors.initials: JP
authors.lastname: McCullough
authors.forename: Philip T
authors.initials: PT
authors.lastname: Ninan
authors.forename: Michael E
authors.initials: ME
authors.lastname: Thase