Text and Data Mining valid from 2019-04-15
Received: 19 December 2018
Accepted: 25 March 2019
First Online: 15 April 2019
Ethics approval and consent to participate
: The local ethics committee of the Charité – Universitätsmedizin Berlin, granted ethical approval (reference no. EA1/269/13). Signed informed consent to participate was obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.
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