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Article History

Received: 17 July 2020

Revised: 30 September 2020

Accepted: 6 October 2020

First Online: 30 October 2020

Compliance with ethical standards

:

: Dr. Jens Kerl: No conflicts to declare.Pia Noeke: No conflicts to declare.Dr. Detlev Heyse: No conflicts to declare.PD Dr. Dominic Dellweg: No conflicts to declare.

: The protocol was approved by the ethics committee of the Münster University (Germany) by registration number 2013–597-f-S.

: The study has been approved by the appropriate ethics committee and has therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments.All persons gave their informed consent prior to their inclusion in the study.

: The participants gave written consent for taking part at the study prior to their study inclusion.

: The participants gave written consent for the publication of the study prior to their study inclusion.

: Not applicable.