1. Department of Health Policy and Management University of Arkansas for Medical Sciences Little Rock Arkansas USA
2. University of Michigan Institute for Social Research Ann Arbor Michigan USA
3. Department of Internal Medicine University of Michigan Medical School Ann Arbor Michigan USA
4. Veterans Affairs Ann Arbor Center for Clinical Management Research Ann Arbor Michigan USA
5. Johns Hopkins Carey Business School Baltimore Maryland USA
6. Johns Hopkins Berman Institute of Bioethics Baltimore Maryland USA
7. Department of Health Systems, Management and Policy Colorado School of Public Health Aurora Colorado USA