Affiliation: | 1.Veteran Affairs Administration Tennessee Valley VA Health Care System Geriatric Research Education Clinical Center (GRECC), Nashville, TN, USA ;2.Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, TN, USA ;3.Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA ;4.Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, USA ;5.Department of Health Policy, Vanderbilt University Medical Center, Nashville, TN, USA ;6.Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA ; |