Barié, Alexander http://orcid.org/0000-0002-6548-5606
Sprinckstub, Thomas
Huber, Jürgen
Jaber, Ayham
Article History
Received: 23 December 2019
Accepted: 31 May 2020
First Online: 5 June 2020
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
: This study has been approved by the appropriate ethics committee (ethics approval no. S-122-98 and has, therefore, been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki. All persons gave their informed consent prior to their inclusion in the study.