Text and Data Mining valid from 2019-04-16
Received: 22 September 2018
Accepted: 31 March 2019
First Online: 16 April 2019
Ethics approval and consent to participate
: This study was conducted in accordance with the Declaration of Helsinki. Collection, storage, and evaluation of patient-related information in our NEN database were performed with the approval of the local ethics committee at the University of Marburg (Philipps-University Marburg) and after obtaining the patients informed consent. Written informed consent for the treatment was obtained. The statement of the local ethics committee was that a formal approval for collection and analysis of data arising from the routine clinical evaluation within the own hospital was not required.
: Individual person’s data are not shown, not applicable.
: The authors declare that they have no competing interests.
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