Text and Data Mining valid from 2019-11-19
Received: 17 May 2019
Accepted: 30 October 2019
First Online: 19 November 2019
Compliance with Ethical Standards
: The study was approved by the hospital ethics committee (NP993/16) and registered online (ExternalRef removed). Informed consent of patients was waived because of the retrospective nature of the study.
: The authors declare that they have no conflict of interest.