1. aDepartment of Public Health and Planning, Policy and Design, University of California, 202 Social Ecology I, Irvine, CA 92697-7075, United States of America (USA).
2. bDepartment of Health Policy, School of Public Health, University of California, Berkeley, USA.
3. cJiann-Ping Hsu College of Public Health, Georgia Southern University, Statesboro, USA.
4. dDepartment of Health Systems Financing, World Health Organization, Geneva, Switzerland.
5. eDepartment of Mental Health and Substance Abuse, World Health Organization, Geneva, Switzerland.
6. fGlobal Center for Health Economics and Policy Research, University of California, Berkeley, USA.
7. gDepartment of Human Resources for Health, World Health Organization, Geneva, Switzerland.