Text and Data Mining valid from 2019-01-07
Received: 19 September 2018
Revised: 18 November 2018
Accepted: 20 November 2018
First Online: 7 January 2019
Compliance with ethical standards
: 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. Individual consent for the study was waived by the committee as it was a retrospective study. All the patients provided informed written consent for the surgery.
: The authors declare that they have no conflict of interest.