1. Safe Surgery Program, Ariadne Labs, Harvard T. H. Chan School of Public Health and Brigham and Women's Hospital, Boston, Massachusetts, USA
2. Department of Surgery, University of Manitoba, Winnipeg, Manitoba, Canada
3. Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts, USA
4. Department of Surgery, Massachusetts General Hospital, Boston, Massachusetts, USA
5. Lifebox, Brooklyn, New York, USA
6. William Harvey Research Institute, Queen Mary University of London and Barts Health NHS Trust, London, UK
7. Department of Clinical Surgery, Royal Infirmary of Edinburgh, University of Edinburgh, UK
8. Department of Anaesthesia and Perioperative Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
9. Department of Surgery, Stanford University Medical Center, Stanford, California, USA