1. Department of Industrial Engineering and Management Sciences, Northwestern University, 2145 Sheridan Road Room C210, Evanston, IL 60208, USA
2. Institute for Healthcare Studies, Feinberg School of Medicine, Northwestern University, 750 N Lake Shore Drive, Rubloff Building, 10th Floor, Chicago, IL 60611, USA
3. Department of Industrial and Operations Engineering, University of Michigan, 1205 Beal Avenue, Ann Arbor, MI 48109, USA