From the Department of Anesthesia, University of Vermont Medical Center, Burlington, Vermont.
Accepted for publication March 23, 2017.
The authors declare no conflicts of interest.
Reprints will not be available from the authors.
Address correspondence to S. Patrick Bender, MD, University of Vermont Medical Center, ACC-WP2, Burlington, VT 05401. Address e-mail to firstname.lastname@example.org.