1 Section of Surgical Sciences, Division of Trauma, Emergency General Surgery, & Surgical Critical Care, Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee.
2 Geriatric Research, Education and Clinical Center Service, Nashville Veterans Affairs (VA) Medical Center, VA Tennessee Valley Healthcare System, Nashville, Tennessee.
3 Critical Illness, Brain Dysfunction, and Survivorship Center, Vanderbilt University Medical Center, Nashville, Tennessee.