1. From Institute for Health Research, Kaiser Permanente Colorado, Denver (T.T.T., T.F.R., S.M.S., N.M.W., P.M.H., D.J.M.); University of Colorado, Denver (T.T.T., T.F.R., R.K.R., R.G., O.J., P.M.H., D.J.M.); UC Davis Health System, Davis, CA (N.H.); Duke Clinical Research Institute, Durham, NC (W.S.J., M.R.P.); Denver VA Medical Center, Denver, CO (P.M.H.); and Division of Research, Kaiser Permanente Northern California, Oakland (A.S.G.).