1. Stanford-Surgery Policy Improvement, Research and Education Center, Department of Surgery, Stanford University School of Medicine, Stanford, California
2. Harbor-UCLA Medical Center, Department of Emergency Medicine, David Geffen School of Medicine at UCLA, Torrance, California
3. Statistical Editor, JAMA Surgery
4. Amsterdam UMC, Location AMC, Department of Surgery, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, Amsterdam, the Netherlands