Funding for this research was provided by:
John Curtin School of Medical Research at Australian National University (669/2014)
Received: 26 January 2022
Accepted: 5 July 2022
First Online: 9 July 2022
: This study was approved by the Research Ethics Board of Health (REBH), Ministry of Health, Royal Government of Bhutan, Thimphu, Bhutan (REBH/Approval/2016/083, dated 6<sup>th</sup> December, 2016), and adhered to the principle of Declaration of Helsinki. Informed consent was waived by REBH because this retrospective study collected only de-identified data.
: Not applicable.