[1] Vet Affairs San Diego Healthcare Syst, Vet Med Res Fdn, San Diego, CA USA
[2] Columbia Univ, Dept Biostat, Mailman Sch Publ Hlth, New York, NY USA
[3] Univ Pittsburgh, Western Psychiat Inst & Clin, Dept Psychiat, Sch Med, Pittsburgh, PA 15213 USA
[4] Columbia Sch Social Work, Ctr Complicated Grief, New York, NY USA
[5] Columbia Univ Coll Phys & Surg, Dept Psychiat, 722 W 168th St, New York, NY 10032 USA
[6] Massachusetts Gen Hosp, Ctr Anxiety & Traumat Stress Disorders, Boston, MA 02114 USA
[7] Harvard Med Sch, Boston, MA USA
[8] Univ Calif San Diego, Dept Psychiat, 9500 Gilman Dr, La Jolla, CA 92093 USA