About the Authors

Ho Anh Hien

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Resources, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

nguyenminhtam@hueuni.edu.vn (NMT); hahien@hueuni.edu.vn (HAH)

Affiliations Department of Family Medicine, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam, Department of Public Health and Primary Care, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium

Nguyen Minh Tam

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing

nguyenminhtam@hueuni.edu.vn (NMT); hahien@hueuni.edu.vn (HAH)

Affiliation Department of Family Medicine, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam

Vo Tam

Roles Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing

Affiliation Department of Internal Medicine, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam

Huynh Van Minh

Roles Conceptualization, Data curation, Investigation, Methodology, Resources, Supervision, Writing – original draft, Writing – review & editing

Affiliation Department of Internal Medicine, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam

Nguyen Phuong Hoa

Roles Conceptualization, Data curation, Funding acquisition, Methodology, Project administration, Supervision, Writing – original draft, Writing – review & editing

Affiliation Department of Family Medicine, Hanoi Medical University, Hanoi, Vietnam

Stefan Heytens

Roles Conceptualization, Data curation, Investigation, Methodology, Supervision, Visualization, Writing – original draft, Writing – review & editing

Affiliation Department of Public Health and Primary Care, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium

Anselme Derese

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Methodology, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing

Affiliation Department of Public Health and Primary Care, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium

Dirk Devroey

Roles Conceptualization, Data curation, Formal analysis, Methodology, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliation Department of Family Medicine and Chronic Care, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium

Competing Interests

The authors have no financial or personal relationships with other people or organizations that could inappropriately influence their work. The authors have declared that no competing interests exist. The authors do not receive any employment or consultancy from the China Medical Board of New York; the authors do not have to submit any patents, products in development, or marketed products to this funder, either. This does not alter our adherence to PLOS ONE policies on sharing data and materials.