Text and Data Mining valid from 2019-03-21
Received: 8 December 2018
Accepted: 21 February 2019
First Online: 21 March 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: Institutional research ethics committee approval (Ref. 18-955-104) was obtained prior to the initiation of this study.
: Informed patient consent was obtained.