1. Quality Enhancement Research Initiative (QUERI), Veterans Heath Administration, U.S. Department of Veterans Affairs, Washington DC, USA
2. Department of Psychiatry, University of Michigan Medical School, Ann Arbor, MI, USA
3. VA Information Resource Center (VIREC), Hines VA Medical Center, Hines, IL, USA
4. School of Public Health, University of Illinois, Chicago, USA
5. Providence VA Medical Center and Veterans Health Administration, Providence, RI
6. Brown School of Medicine, Providence, RI, USA
7. Health Services Research and Development, Veterans Health Administration, U.S. Department of Veterans Affairs, Washington DC, USA