Received: 21 January 2021
Accepted: 23 February 2021
First Online: 6 March 2021
: This study was approval by the ethical review committee of the National Institute of Cardiovascular Diseases (NICVD), Karachi (ERC-43/2019). Verbal informed consent was obtained from all the patients regarding their participation in the study and publication of data while maintaining confidentiality and anonymity. Due to observational nature of the study, ERC waived the written consent.
: Not applicable
: All authors have no conflict of interest to disclose.