Text and Data Mining valid from 2018-11-26
Received: 3 July 2018
Accepted: 19 November 2018
First Online: 26 November 2018
Compliance with ethical standards
: Yan Yu Tan, Howard Chu, Mihir Chandarana, Sadaf Jafferbhoy, Sankaran Narayanan, Sekhar Marla and Soni Soumian declare that they have no conflict of interest.
: 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.
: Formal patient consent is not required for this retrospective analysis.