Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (33IC30_166811)
Text and Data Mining valid from 2018-07-13
Received: 16 March 2018
Accepted: 24 June 2018
First Online: 13 July 2018
Ethics approval and consent to participate
: The study was approved by the lead cantonal ethics committee in Zurich (Switzerland) and the cantonal ethics committee in Berne (Switzerland) and Geneva (Switzerland), Registration number: 2016–02012.
: Not applicable.
: The authors declare that they have no competing interests.
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