1. Department of Statistics, University of Pennsylvania, Philadelphia, PA
2. Department of Econometrics and Statistics at the Booth School of Business of the University of Chicago, Chicago, IL
3. Department of Technology and Operations Management at INSEAD, Fontainebleau, France
4. Department of Pediatrics and Anesthesiology & Critical Care, The University of Pennsylvania School of Medicine and Department of Health Care Management, The Wharton School, Philadelphia, PA