Received: 21 January 2020
Accepted: 23 August 2020
First Online: 10 September 2020
Ethics approval and consent to participate
: An ethical waiver was obtained from the Institutional Review Board of International Islamic University, Islamabad. All study participants provided written informed consent to participate.
: Not applicable.
: The authors declare that they have no competing interests. FF serves as Associate Editor for BMC Health Services Research.