1. Southern Arizona Veterans Affairs Health Care System, Tucson, AZ, USA
2. University of Arizona College of Medicine, Tucson, AZ, USA
3. University of Arizona College of Public Health, Tucson, AZ, USA
4. University of Arizona College of Pharmacy, Tucson, AZ, USA
5. The Center for Health Research, Kaiser Permanente Northwest, Portland, OR, USA
6. Kaiser Permanente Medical Care Program, Oakland, CA, USA
7. City of Hope National Medical Center/Beckman Research Institute, Duarte, CA, USA