Gkagkalis, Georgios
Goetti, Patrick
Mai, Sabine
Meinecke, Ingmar
Helmy, Näder
Bosson, Dominique
Kutzner, Karl Philipp http://orcid.org/0000-0001-6363-8165
Article History
Received: 5 January 2019
Accepted: 27 March 2019
First Online: 17 April 2019
Ethics approval and consent to participate
: All procedures performed were in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Ethical approval was obtained from the Freiburg Ethics Commission International (feki Code: 010/2071).Written consent was obtained from all individual participants included in the study.
: Not applicable.
: Author KPK serves as instructor for the optimys stem for Mathys Ltd. Bettlach, Switzerland. All other authors declare that they have no competing interest.
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