1. Richard L. Roudebush VA Medical Center and Indiana University School of Medicine, Indianapolis, Indiana (C.J.K., L.J.M.)
2. VA Medical Center, White River Junction, Vermont, and Geisel School of Medicine at Dartmouth and the Dartmouth Institute Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire (H.P., D.J.R.)
3. George Washington University and Veterans Affairs Medical Center, Washington, DC (D.M.)
4. Richard L. Roudebush VA Medical Center, Indiana University School of Medicine, and Regenstrief Institute, Indianapolis, Indiana (T.F.I.)