From the Department of Anesthesiology, University of Virginia, Charlottesville, Virginia.
Accepted for publication March 24, 2017.
The author declares no conflicts of interest.
Reprints will not be available from the author.
Address correspondence to Robert H. Thiele, MD, Department of Anesthesiology, University of Virginia, PO Box 800710, Charlottesville, VA 22908. Address e-mail to email@example.com.