Posttraumatic stress disorder; combat exposure; and nicotine dependence, alcohol dependence, and major depression in male twins.
Scherrer JF, Xian H, Lyons MJ, Goldberg J, Eisen SA, True WR, Tsuang M, Bucholz KK, Koenen KC. Posttraumatic stress disorder; combat exposure; and nicotine dependence, alcohol dependence, and major depression in male twins. Compr Psychiatry. 2008 May-Jun; 49(3):297-304.