Marschalek, Julian
Ott, Johannes
Aitzetmueller, Matthias
Mayrhofer, Daniel
Weghofer, Andrea
Nouri, Kazem
Walch, Katharina
Article History
Received: 5 December 2018
Accepted: 7 February 2019
First Online: 21 February 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The ethical review board of the Medical University of Vienna approved the study (EK 044/2010). All the 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.
: As this study comprises retrospectively collected and analyzed data, the ethical review board approved the waiver of written informed consent.