Received: 30 April 2020
Accepted: 30 December 2020
First Online: 19 January 2021
Ethics approval and consent to participate
: The ethical approval for the present study was obtained by Research and Ethical Committee, Rawalpindi Medical College and Allied Hospitals, Rawalpindi, Pakistan. Approval obtained on June 1, 2015.
: The consent for publication was obtained from all study participants at the time of enrollment.
: The authors declare that they have no competing interests.