Department of Anesthesiology and Pediatrics, College of Physicians and Surgeons, Columbia University, New York, NY

The author has no funding or conflicts of interest to disclose.

Reprints: Lena S. Sun, MD, Department of Anesthesiology and Pediatrics, Columbia University College of Physicians and Surgeons, CH 4-440 North, 622 West 168th Street, New York, NY 10032 (e-mail: lss4@cumc.columbia.edu).

Received July 9, 2014

Accepted July 9, 2014