Kreuzthaler, Markus
Pfeifer, Bastian
Vera Ramos, Jose Antonio
Kramer, Diether
Grogger, Victor
Bredenfeldt, Sylvia
Pedevilla, Markus
Krisper, Peter
Schulz, Stefan
Article History
First Online: 4 April 2019
Ethics approval and consent to participate
: This study was approved by the ethics committee of the Medical University of Graz (30–496 ex 17/18).
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.