Novak, B.
Holler, P.
Jaunig, J.
Ruf, W.
van Poppel, M. N. M.
Sattler, M. C. http://orcid.org/0000-0002-0689-1938
Article History
Received: 12 June 2019
Accepted: 7 January 2020
First Online: 16 January 2020
Ethics approval and consent to participate
: Ethical approval was obtained by the Ethics Committee of the University of Graz (GZ. 39/51/63 ex 2017/18). Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.