Zimmermann, Julia
Jesse, Sarah
Kassubek, Jan
Pinkhardt, Elmar
Ludolph, Albert C.
Article History
Received: 6 March 2019
Revised: 13 May 2019
Accepted: 16 May 2019
First Online: 27 June 2019
Compliance with ethical standards
:
: None to report for all the authors.
: This study has been approved by the appropriate ethics committee and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki.