1. Department of Family Medicine, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam
2. Department of Family Medicine and Chronic Care, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium
3. Department of Internal Medicine, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam
4. Department of Family Medicine and Primary Health Care, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium