Received: 2 December 2020
Accepted: 19 May 2021
First Online: 31 May 2021
: The study was approved by the Institutional Ethical Review Committee at Aga Khan University Hospital, Karachi with an exemption of informed consent from patients as it is a retrospective study which did not involve any contact with the patient. The reference number for the study was 2019–1274-3270.
: Not applicable.
: The authors declare that they have no competing interests.