1. Centers for Disease Control of Thua Thien Hue Province, Hue, Vietnam
2. Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, VIC, Australia
3. Faculty of Public Health, College of Medicine and Pharmacy, Hue University, Hue, Vietnam
4. Undergraduate Training Office, College of Medicine and Pharmacy, Hue University of Medicine and Pharmacy, Hue, Vietnam