1. Department of Health Systems, Management and Policy, University of Colorado Anschutz Medical Campus , Aurora, CO 80045 , United States
2. Department of Internal Medicine, The University of Texas Medical Branch School of Public and Population Health, Galveston , TX 77555 , United States
3. Temerty Faculty of Medicine, University of Toronto , Toronto, ON M5S 1A8 , Canada
4. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore , MD 21205 , United States
5. Johns Hopkins Carey Business School , Baltimore, MD 21202 , United States