Belz, Michael http://orcid.org/0000-0001-9250-6049
Methfessel, Isabel
Spang, Miriam
Besse, Matthias
Folsche, Thorsten
Stephani, Caspar
Zilles, David
Article History
Received: 16 May 2019
Accepted: 12 July 2019
First Online: 17 July 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study has been approved by the local 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.