1. VA Central Western Massachusetts Healthcare System, 421 N Main Street, Leeds, MA 01053.
2. Quantitative Health Sciences, University of Massachusetts Medical School, 55 N Lake Avenue, Worcester, MA 01655.
3. Washington DC VA Medical Center and George Washington University School of Medicine and Health Sciences, 2300 I Street NW, Washington, DC 20037.
4. Yale University School of Medicine, 333 Cedar Street, New Haven, CT 06510.
5. Center for Interdisciplinary Research on AIDS, Yale University School of Public Health, 135 College Street, Suite 200, New Haven, CT 06510-2483.
6. play2PREVENT Lab and Center for Health & Learning Games, Yale University School of Medicine, 367 Cedar Street, Harkness Hall A, Suite 411, New Haven, CT 06510.