Funding for this research was provided by:
Legacy for this study through NiederKraftFrey, Zurich, Switzerland (n.a.)
Text and Data Mining valid from 2018-06-25
Received: 23 December 2016
Accepted: 7 June 2018
First Online: 25 June 2018
Ethics approval and consent to participate
: The trial was approved by the ethical committees (Bern KEK 115/10, Basel EKBB 35/11 and Berlin KEK 115/10). All participants consented to participate and signed an informed consent form prior to the beginning of the interventions.
: Not applicable
: The authors declare that they have no competing interests.
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