1. Department of Otolaryngology, George Washington University, Washington, DC
2. Department of Otolaryngology, Children’s National Medical Center, Washington, DC
3. Department of Internal Medicine, Johns Hopkins University, and the Welch Center for Prevention, Epidemiology, and Clinical Research, Baltimore, Maryland
4. Department of Otolaryngology—Head and Neck Surgery, Johns Hopkins University, and the Armstrong Institute for Patient Safety and Quality, Baltimore, Maryland