Received: 25 November 2019
Accepted: 12 January 2020
First Online: 22 January 2020
Ethics approval and consent to participate
: The study was approved by our Institutional ethics committee of Kasturba hospital, Manipal (IEC 45/2013). The ethical committee exempted the study from a specific consent, being a retrospective analytic study that reveals no identifiable personal or private information.
: Not applicable
: The authors declare that they have no competing interests.