Grass, Fabian
Pache, Basile http://orcid.org/0000-0003-0969-7345
Butti, Fabio
Solà, Josep
Hahnloser, Dieter
Demartines, Nicolas
Hübner, Martin
Article History
Received: 28 August 2018
Accepted: 10 December 2018
First Online: 3 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/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: This study was conducted as an institutional quality improvement project. Therefore, no informed consent was needed, after approval of the Institutional Review Board (Commission cantonale d’éthique de la recherche sur l’être humain CER-VD # 2017-01971).