1 Division of General Internal Medicine and Health Services Research, UCLA Department of Medicine, 1100 Glendon Avenue, Suite 850, Los Angeles, CA, 90024, USA. drhays@ucla.edu.
2 RAND Corporation, Behavioral and Policy Sciences, 1776 Main Street, Santa Monica, CA, USA.
3 RAND Corporation, Behavioral and Policy Sciences, 20 Park Plaza #910, Boston, MA, USA.
4 Patient Reported Outcomes, Value and Experience (PROVE) Center, Department of Surgery, Brigham and Women's Hospital, Boston, MA, USA.