Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (KO 2045/19-1)
Article History
Received: 23 October 2017
Accepted: 15 June 2018
First Online: 20 June 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest (financial or non-financial). Moreover, we have full control of all primary data and we agree to allow the journal to review the data if requested.
: All procedures performed in the present study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standard.
: Informed consent was obtained from all individual participants included in the study.