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Article History

Received: 4 October 2017

Accepted: 8 February 2018

First Online: 14 February 2018

Authors’ information

: Not applicable.

: The study has been performed in accordance with the Declaration of Helsinki and was approved by the ethics committee (Ethikkommission an der MedizinischenFakultät der Universität Rostock St.-Georg-Str. 108, 18,055 Rostock) of the Medical Faculty of the University of Rostock under the reference no A2014–0011. All study participants gave their written declaration of informed consent after the issues and risks associated with participating in the test were explained.

: Not applicable.

: The authors declare that there is no conflict of interest regarding the publication of this article. The study centres did not receive any financial support nor was there a conflict of interest regarding data analysis or manuscript writing. The clinical part of the study, the statistics and manuscript preparation were performed within the scope of the duties of the public institutes involved without additional funding. The authors did not receive any funding, grants, honoraria or any other form of recognition or compensation of any kind from a sponsor.

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