1. Department of Otolaryngology‐Head and Neck Surgery Johns Hopkins University School of Medicine Baltimore Maryland U.S.A.
2. Armstrong Institute for Patient Safety and Quality Johns Hopkins University Baltimore Maryland U.S.A.
3. Department of Anesthesiology and Critical Care Medicine Johns Hopkins University School of Medicine Baltimore Maryland U.S.A.
4. Department of Health Policy and Management Johns Hopkins Bloomberg School of Public Health Baltimore Maryland U.S.A.
5. Johns Hopkins Carey Business School Baltimore Maryland U.S.A.