1 Department of Anesthesiology, Vanderbilt University Medical Center, Vanderbilt University, Nashville, TN 37212, USA; Critical Illness, Brain Dysfunction, and Survivorship Center, Nashville, TN, USA. Electronic address: christina.s.boncyk@vumc.org.
2 Department of Anesthesiology, Intensive Therapy and Acute Intoxications, Pomeranian Medical University, Szczecin, Poland.
3 Critical Illness, Brain Dysfunction, and Survivorship Center, Nashville, TN, USA; Geriatric Research, Education and Clinical Center Service, Department of Veterans Affairs Medical Center, Tennessee Valley Health Care System, Nashville, TN, USA.