Gero, Daniel
Tzafos, Stefanos
Milos, Gabriella
Gerber, Philipp A.
Vetter, Diana
Bueter, Marco
Funding for this research was provided by:
University of Zurich
Article History
First Online: 4 January 2019
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and cantonal research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The Cantonal Ethics Committee of Zurich approved the study (nr: 2016-00022). For this type of study, formal consent is not required, as it was a retrospective study.