Funding for this research was provided by:
Manchester Biomedical Research Centre
Suan Dusit University
Received: 23 March 2019
Accepted: 4 July 2019
First Online: 10 July 2019
Ethics approval and consent to participate
: This study was approved by the Ethical Review Committee for Human Research, Faculty of Public Health, Mahidol University, Thailand (COA. No. MUPH 2014–189).
: Not applicable.
: The authors declare that they have no competing interests.