[1] Univ Penn, Ctr Excellence Subst Addict & Treatment CESATE, Corporal Michael J Crescenz VA Med Ctr, Perelman Sch Med, Philadelphia, PA USA
[2] Univ Penn, Ctr Mental Hlth, Perelman Sch Med, Philadelphia, PA USA
[3] Univ Penn, Ctr Hlth Equ Res & Promot CHERP, Corporal Michael J Crescenz VA Med Ctr, Perelman Sch Med, Philadelphia, PA USA
[4] Univ Penn, Perelman Sch Med, Dept Family Med & Community Hlth, Philadelphia, PA USA
[5] Univ Penn, Sch Nursing, Philadelphia, PA USA
[6] Univ Colorado, VA Rocky Mt Mental Illness Res Educ & Clin Ctr Sui, Rocky Mt Reg VA Med Ctr & Firearm Injury Prevent I, Anschutz Sch Med, Aurora, CO USA
[7] Corporal Michael J Crescenz VA Med Ctr, Mailstop116,MIRECC,3900 Woodland Ave, Philadelphia, PA 19104 USA