Mai, Vu Quynh http://orcid.org/0000-0001-6962-0564
Sun, Sun http://orcid.org/0000-0001-5948-3025
Minh, Hoang Van http://orcid.org/0000-0002-4749-5536
Luo, Nan http://orcid.org/0000-0001-7980-6979
Giang, Kim Bao http://orcid.org/0000-0003-2290-0205
Lindholm, Lars http://orcid.org/0000-0002-1633-2179
Sahlen, Klas Goran http://orcid.org/0000-0002-3975-4868
Funding for this research was provided by:
EuroQol Research Foundation (EQ Project 20170220)
Article History
Accepted: 17 February 2020
First Online: 27 March 2020
Compliance with ethical standards
:
: The authors declare no conflicts of interest regarding the publication of this article.
: The study design was considered and approved by the Ethical Review Board for Biomedical Research at the Hanoi University of Public Health (Identification number: 374/2017/YTCC-HD3). Written consent forms were obtained from participants before the interviews and the consent forms are stored at the Hanoi University of Public Health.