Funding for this research was provided by:
Medical University of Vienna
Article History
Received: 27 February 2019
Accepted: 19 December 2019
First Online: 8 January 2020
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: All procedures performed in studies 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 standards.
: For this type of study, formal consent is not required.