Klein, Sabrina http://orcid.org/0000-0003-0645-3740
Nurjadi, Dennis
Horner, Susanne
Heeg, Klaus
Zimmermann, Stefan
Burckhardt, Irene
Article History
Received: 2 February 2018
Accepted: 29 March 2018
First Online: 13 April 2018
Compliance with ethical standards
: For this type of study, formal consent is not required. This article does not contain any studies with animals performed by any of the authors.
: The authors declare that they have no conflict of interest.