1. Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts, United States
2. Department of Quality and Safety, Brigham and Women's Hospital, Boston, Massachusetts, United States
3. Partners HealthCare, Somerville, Massachusetts, United States
4. Department of Biomedical Informatics, Harvard Medical School, Boston, Massachusetts, United States
5. Armstrong Institute for Patient Safety and Quality, Johns Hopkins Hospital, Baltimore, Maryland, United States