Kisker, Joanna
Gruber, Thomas
Schöne, Benjamin
Article History
Received: 18 June 2019
Accepted: 3 September 2019
First Online: 13 September 2019
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.
: All procedures performed in this study involving human participants were in accordance with the ethical standards of the local ethic committee of Osnabrueck University and with the 1964 Helsinki Declaration.