1. Yale University , Department of Health Policy and Management, New Haven, CT 06510 , United States
2. Veterans Health Administration , West Roxbury, MA 02132 , United States
3. Dana-Farber Cancer Institute , Boston, MA 02215 , United States
4. Department of Medicine, University of Massachusetts Chan Medical School , Worcester, MA 01655 , United States
5. NYU Grossman School of Medicine , NewYork, NY 10016 , United States