Received: 13 March 2020
Accepted: 30 June 2020
First Online: 9 July 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the Ethical Research Committee by the Faculty of Public Health, Indonesia University. Signed informed consent was sought from each participant prior to the interview and participation of all subjects was voluntary.
: Not applicable.
: The authors declare that they have no competing interests.