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Article History

Received: 13 October 2017

Accepted: 10 July 2018

First Online: 27 July 2018

Ethics approval and consent to participate

: Ethics approval was granted by the University of Leipzig, Medical Faculty, Ethics Committee. All participants signed informed consent for participation and for the use of their data.

: All patients were informed about the publication and signed a consent for publication.

: The authors declare that they have no competing interests.

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