Received: 7 May 2020
Accepted: 3 August 2020
First Online: 21 October 2020
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Since this study was a retrospective audit of anonymized patient records, formal retrospective consent was not required.
: For this type of study consent for publication is not required.
: The authors declare that they have no conflict of interest.