1. Brown University School of Public Health, Providence, Rhode Island (O.A.P., R.G., M.R., M.R.)
2. College of Health & Human Services, Northern Arizona University, Flagstaff, Arizona (A.K.)
3. Vanderbilt University School of Medicine, Nashville, Tennessee (L.M.K.)
4. Brown University School of Public Health and Providence VA Medical Center, Providence, Rhode Island (P.L.G., V.M., A.N.T.)