Received: 3 April 2019
Accepted: 16 July 2019
First Online: 25 July 2019
Ethics approval and consent to participate
: Formal written approval from hospital administration was obtained regarding use of anonymized and de-identified medical records. Consent to participate was not applicable to this study which was a secondary analysis of de-identified retrospective medical records. Further, none of the researchers had access to identifying information. The study was approved by the Institutional Review Board of the Jinnah Postgraduate Medical Centre, Karachi, Pakistan. (Reference Number: F.2–81/2014-GENL/3434/JPMC).
: Not applicable.
: The authors declare that they have no competing interests.