1. SCPO (USN), 2d Marine Raider Battalion, Marine Forces Special Operations Command (MARSOC) , Camp Lejeune, NC 28547, USA
2. ENS (USNR), University of North Carolina School of Medicine, Bondurant Hall, CB #9500 , Chapel Hill, NC 27599, USA
3. Department of Anesthesiology, N2198, CB7010, The University of North Carolina at Chapel Hill, UNC Hospitals , Chapel Hill, NC 27599-7010, USA
4. Cardiothoracic Division, Department of Anesthesiology, N2198, CB7010, The University of North Carolina at Chapel Hill, UNC Hospitals , Chapel Hill, NC 27599-7010, USA