Text and Data Mining valid from 2019-11-07
Received: 11 September 2019
Accepted: 28 October 2019
First Online: 7 November 2019
Ethics approval and consent to participate
: The local ethics committee approved this study (referral number: 2018–00179) and waived the need to obtain informed patient consent.
: Not applicable
: The authors declare that they have no competing interests.