Vogelgsang, Jonathan
Heßmann, Philipp
Wolff-Menzler, Claus
Gyßer, Stephan
Müller, Gerhard A.
Wiltfang, Jens
Article History
Received: 7 February 2019
Accepted: 16 April 2019
First Online: 25 April 2019
Compliance with ethical standards
:
: SG is a full-time employee of GSG consultant. The remaining authors declare that they have no conflict of interest.