1. Center for Population Health SciencesHanoi School of Public Health, Hanoi, Vietnam
2. Center for Health System ResearchHanoi Medical University, Hanoi, Vietnam
3. Unit of Epidemiology and Global HealthDepartment of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
4. JW Lee Center for Global Medicine, Seoul National University College of Medicine, Seoul, Korea
5. Department of Family Medicine, Seoul National University Hospital, Seoul, Korea
6. Institute for Preventive Medicine and Public HealthHanoi Medical University, Hanoi, Vietnam