1. Center for Health Quality, Outcomes, and Economic Research (CHQOER), Bedford VAMC, Bedford, Mass, Boston University School of Public Health, Boston, Mass,
2. RxRemedy, Inc, Westport, Conn
3. CHQOER, Boston University School of Public Health
4. CHQOER
5. Evans Memorial Department of Medicine, Boston Medical Center, Boston, Mass
6. Boston Medical Center, Boston, Mass