1. Department of Emergency Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa
2. Department of Epidemiology, University of Iowa College of Public Health, Iowa City, Iowa
3. Divison of Critical Care, Department of Anesthesia, University of Iowa Carver College of Medicine, Iowa City, Iowa
4. Department of Management and Entrepreneurship, University of Iowa Tippie College of Business, Iowa City, Iowa