Received: 9 May 2019
Accepted: 20 November 2019
First Online: 28 November 2019
Ethics approval and consent to participate
: Ethics committee approval was obtained from Ethical Review Board of Allama Iqbal medical College/ Jinnah Hospital, Lahore and written informed consent forms were administered to participants before inclusion into the study.
: Not applicable.
: The authors declare that they have no competing interests.