Received: 28 June 2019
Accepted: 27 November 2019
First Online: 16 December 2019
Ethics approval and consent to participate
: The Ethics Committee of Research of the Mongolian National University of Medical Sciences (MNUMS) approved the study protocol. Informed written (signed) consent was obtained from all participants.
: Not applicable.
: TJS is a Director and Trustee of <i>Lifting The Burden</i>. Otherwise, the authors declare that they have no competing interests.