Text and Data Mining valid from 2019-09-05
Received: 28 March 2019
Accepted: 26 August 2019
First Online: 5 September 2019
Ethics approval and consent to participate
: The study protocol was evaluated and approved by the local ethics committee (University of Heidelberg, no. S-248/2017). Patients’ consent was not obtained following the recommendations of the local review board (use of anonymized, retrospective data).
: Not applicable.
: The authors state that they have no financial or non-financial conflicts of interest regarding this research.