1. Department of Public Health, School of Social Sciences, Humanities and Arts, University of California Merced, 5200 N Lake Road, Merced, CA 95343, USA
2. Department of Public Health, College of Life Sciences, Brigham Young University, 4103 LSB, Provo, UT 84602, USA
3. Research and Training Centre for Community Development (RTCCD), No 39 Lane 255, Vong Street, Hai Ba Trung District, Hanoi, Vietnam
4. Department of Health Policy and Management, University of California Los Angeles, Fielding School of Public Health, 650 Charles E. Young Dr. South, Los Angeles, CA 90095-1772, USA