Funding for this research was provided by:
Austrian Science Fund (W1233-G17, Y-777)
Received: 13 December 2019
Accepted: 19 March 2020
First Online: 12 May 2020
Ethics approval and consent to participate
: The study had been approved by the ethics commission of the medical university of Graz (21-506 ex 09/10) and the ethics commission of Salzburg (415-E/2034). Informed consent was obtained from the patients’ legal representatives.
: Not applicable.
: The authors declare that they have no competing interests.