Höring, Steffen
Massarani, Alain Sami
Löffler, Bettina
Rödel, Jürgen
Article History
Received: 18 September 2018
Accepted: 29 November 2018
First Online: 24 January 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study has been approved by the local research ethics committee (5358-11/17).