Pfrepper, C. http://orcid.org/0000-0002-0485-7402
Deters, S.
Metze, M.
Siegemund, R.
Gockel, I.
Petros, S.
Article History
Received: 19 December 2018
Accepted: 4 February 2019
First Online: 18 February 2019
Compliance with ethical standards
: The study was approved by the ethics committee of the University of Leipzig (Az. 417/16-ek) and was conducted according to the declaration of Helsinki.
: The authors declare that they have no conflict of interest.