[1] Vet Affairs Maine Healthcare Syst Togus, Augusta, ME 04330 USA
[2] Univ Minnesota, Dept Psychiat, Sch Med, Minneapolis, MN 55455 USA
[3] Vet Affairs Connecticut Healthcare Syst, West Haven, CT USA
[4] Yale Univ, Dept Psychiat, Sch Med, New Haven, CT 06520 USA