[1] Vet Affairs New England Mental Illness Res Educ &, West Haven, CT 06516 USA
[2] Yale Univ, Sch Med, Dept Psychiat, New Haven, CT USA
[3] Vet Affairs Northeast Program Evaluat Ctr, West Haven, CT 06516 USA
[4] Natl Ctr Homelessness Vet, Philadelphia, PA USA
[5] Yale Univ, Sch Publ Hlth, Dept Epidemiol & Publ Hlth, New Haven, CT USA