Krappinger, Dietmar
Lindtner, Richard A.
Benedikt, Stefan
Funding for this research was provided by:
University of Innsbruck and Medical University of Innsbruck
Article History
Received: 5 November 2018
Revised: 23 January 2019
Accepted: 25 March 2019
First Online: 3 June 2019
Compliance with ethical guidelines
:
: D. Krappinger, R.A. Lindtner and S. Benedikt declare that they have no competing interests.
: The Ethics Committee of the Medical University of Innsbruck confirmed in a general statement that for retrospective observational studies no ethics committee approval is required by Austrian law.