Funding for this research was provided by:
Österreichische Forschungsförderungsgesellschaft (FFG 862830)
Received: 26 September 2018
Accepted: 10 January 2019
First Online: 28 January 2019
Ethics approval and consent to participate
: The Institutional Review Board of the Medical University of Vienna approved the study protocol and all participants provided written informed consent, ahead of starting the collection of data.
: Not applicable.
: The authors declare that they have no competing interests.
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