Double depression in older adult psychiatric outpatients: Hopelessness as a defining feature
Joiner TE, Cook JM, Hersen M, Gordon KH. Double depression in older adult psychiatric outpatients: Hopelessness as a defining feature. Journal Of Affective Disorders 2007, 101: 235-238. PMID: 17475340, DOI: 10.1016/j.jad.2005.03.019.Peer-Reviewed Original Research