1. East Tennessee State University Quillen College of Medicine, 178 Maple Ave., Mountain Home, TN 37684, USA
2. Department of Anesthesiology & Critical Care Medicine, Johns Hopkins University School of Medicine, 550 N. Broadway, Suite 301, Baltimore, MD 21205, USA
3. Berman Institute of Bioethics, Johns Hopkins University School of Medicine, 550 N. Broadway, Suite 301, Baltimore, MD 21205, USA