Ursano Robert J, Benedek David M, Engel Charles C
Department of Psychiatry, Uniformed Services University School of Medicine, 4301 Jones Bridge Road, Bethesda, MD 20814, USA.
Ann Intern Med. 2012 Dec 18;157(12):905-6. doi: 10.7326/0003-4819-157-11-201212040-00542.