Bäumlein, Martin
Hanke, Alexander
Gueorguiev, Boyko
Nerlich, Michael
Liodakis, Emmanouil
Perren, Thomas
Rillmann, Paavo
Ryf, Christian
Loibl, Markus
Article History
Received: 27 November 2018
First Online: 12 March 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study was approved by the institutional review board.
: Informed consent was obtained from all individual participants included in the study in accordance with the declaration of Helsinki.