Hefler-Frischmuth, Katrin http://orcid.org/0000-0001-6166-9312
Grimm, Christoph
Gensthaler, Lisa
Reiser, Elisabeth
Schwameis, Richard
Hefler, Lukas A.
Article History
Received: 5 June 2018
Accepted: 14 August 2018
First Online: 3 September 2018
Compliance with ethical guidelines
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: K. Hefler-Frischmuth, C. Grimm, L. Gensthaler, E. Reiser, R. Schwameis, and L.A. Hefler declare that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. IRB approval (IRB approval number: 247/2009) was obtained for the present study. Due to the retrospective design of our study informed consent from patients was not necessary.