Text and Data Mining valid from 2018-06-18
Received: 16 October 2017
Accepted: 8 May 2018
First Online: 18 June 2018
Ethics approval and consent to participate
: This prospective single-centre study was registered under ExternalRef removed (identifier: NCT02280226) and additionally approved by the institutional ethics committee review board of Bonn; Germany (373/13). Participants received an information sheet 14 days prior to the study. Informed consent was individually obtained from all participants included in the study. This study was not funded and all contributors participated on a voluntary basis.
: The authors declare that they have no competing interests.
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