Prevost, Gian Andrea http://orcid.org/0000-0002-6041-3304
Odermatt, Manfred
Furrer, Markus
Villiger, Peter
Article History
Received: 19 August 2018
Accepted: 17 October 2018
First Online: 30 October 2018
Ethics approval and consent to participate
: The cantonal ethics committee of Zurich reviewed and accepted the protocol for this study.
: Not applicable
: The authors declare that they have no competing interests.
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