1 Professor of medicine and associate dean for graduate and continuing medical education, Division of General Internal Medicine, Department of Medicine, University of California, San Francisco, School of Medicine, San Francisco, California; baron@medicine.ucsf.edu. Associate professor of pediatrics, Division of Hospital Medicine, Department of Pediatrics, and director of quality and safety programs, Office of Graduate Medical Education, University of California, San Francisco, School of Medicine, San Francisco, California. Professor of medicine, Division of Hospital Medicine, Department of Medicine, University of California, San Francisco, School of Medicine, and associate chief medical officer, UCSF Medical Center, San Francisco, California. Consultant, Division of Internal Medicine, Singapore General Hospital, and associate professor of education and Health Systems and Services Research, Duke-NUS Graduate Medical School, Singapore.