Funding for this research was provided by:
Austrian Research Fund FWF (P33062)
Austrian Research Fund (P28302)
Austrian Cancer Society/Tirol (P17006)
Received: 19 June 2020
Accepted: 22 September 2020
First Online: 1 October 2020
Ethics approval and consent to participate
: The protocol was approved by the institutional ethics review board of the Medical University Innsbruck (study AN2013-0006). An informed consent was signed by the patients.
: Not applicable.
: The authors declare that they have no competing interests.