Text and Data Mining valid from 2018-12-11
Received: 17 July 2018
Accepted: 10 November 2018
First Online: 11 December 2018
Compliance with ethical standards
: Approval for retrospective evaluation and publication was obtained from our institutional research ethics board. This study followed the Declaration of Helsinki.
: Informed consent was obtained from all patients for being included in the study.
: The authors declare that they have no conflict of interest.