Schäfer, A.
Gehwolf, Philipp
Umlauft, J.
Dziodzio, T.
Biebl, M.
Perathoner, A.
Cakar-Beck, F.
Wykypiel, H.
Funding for this research was provided by:
University of Innsbruck and Medical University of Innsbruck
Article History
First Online: 27 November 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: The Etics Committee of the Medical University of Innsbruck confirms that for retrospective observational studies no ethics committee approval is required by Austrian law.