From the *Department of Anesthesiology, Stanford University, Palo Alto, California; and †Department of Pharmacology, Virginia Commonwealth University, Richmond, Virginia.
Accepted for publication April 9, 2014.
The authors declare no conflicts of interest.
Reprints will not be available from the authors.
Address correspondence to Pamela Flood, MD, MA, Department of Anesthesiology, Stanford University, 300 Pasteur Dr., Palo Alto, CA 94305. Address e-mail to email@example.com.