Text and Data Mining valid from 2019-10-11
Received: 1 May 2019
Accepted: 25 September 2019
First Online: 11 October 2019
Ethics approval and consent to participate
: The study was approved by the local ethics committee (Ethics committee II, University Medicine Mannheim, reference no. 2018-502 N-MA).
: Not applicable – retrospective chart review.
: The authors declare that they have no competing interests.