From the *Department of Anesthesiology and Critical Care, University of Pennsylvania Health System, Philadelphia, Pennsylvania
†Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
‡Ariadne Labs, Boston, Massachusetts
§Center for Surgery and Public Health, Boston, Massachusetts.
Accepted for publication August 15, 2017.
The authors declare no conflicts of interest.
Reprints will not be available from the authors.
Address correspondence to David L. Hepner, MD, MPH, Brigham and Women’s Hospital, 75 Francis St, Boston, MA 02115. Address e-mail to email@example.com.