Article History
Received: 24 January 2019
Revised: 6 April 2019
Accepted: 15 April 2019
First Online: 1 May 2019
Compliance with ethical standards
:
: The authors 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.
: As this study involved retrospective analysis of existing clinical data, informed consent was not obtained from participants.