Text and Data Mining valid from 2019-04-06
Received: 18 February 2019
Accepted: 26 March 2019
First Online: 6 April 2019
Ethics approval and consent to participate
: The present study was performed in conformity with the ethical guidelines of the Declaration of Helsinki. The study was approved by the local ethics committee. Written informed consent was obtained from all patients before study inclusion.
: Not applicable.
: The authors declare that they have no competing interests.
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