Received: 31 October 2019
Accepted: 21 January 2020
First Online: 11 March 2020
Ethics approval and consent to participate
: This study was approved by the University of Melbourne Human Research Ethics Committee (1851406.1). The study complied with the Declaration of Helsinki. All participants were aware of the nature of the study and provided their consent prior to the commencement of the study.
: Not applicable
: Jaafar Abduo, and Douglas Lau declare that they have no competing interests.