Received: 18 September 2017
Accepted: 21 February 2018
First Online: 27 February 2018
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board of the School of Medicine, Syiah Kuala University. Before enrollment, all participants received a brief explanation of the aims, risks and benefits of the study and were informed that they could terminate the interviews at any time. All participants signed written informed consent forms prior to enrollment.
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.