Text and Data Mining valid from 2019-05-08
Received: 6 November 2018
Accepted: 25 April 2019
First Online: 8 May 2019
Ethics approval and consent to participate
: This study was approved by the local ethics committee, Faculty of Medicine, University Leipzig (AZ 024/14ff) and was performed in accordance with the ethical standards of the Declaration of Helsinki and its later amendments. Written informed consent for the scientific use of the anonymized data was obtained as an institutional standard procedure in each patient.
: Not applicable.
: The authors declare that they have no competing interests.
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