From the Nuffield Department of Anesthetics. University of Oxford, Oxford, United Kingdom.
Accepted for publication January 30, 2014.
The author declares no conflicts of interest.
Reprints will not be available from the author.
Address correspondence to John W. Sear, MS, BSc, MBBS, PhD, FFARCS, FANZCA, Nuffield Department of Anesthetics, University of Oxford, Oxford OX3 9DU, United Kingdom. Address e-mail to email@example.com.