Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (PP00P1_163716/1)
Text and Data Mining valid from 2019-06-10
Received: 13 February 2019
Accepted: 10 April 2019
First Online: 10 June 2019
Ethics approval and consent to participate
: The study was registered with the ISRCTN: ISRCTN11209732 and approved by the Ethics Committee of northwestern and central Switzerland (Ethikkommission Nordwest- und Zentralschweiz; EKNZ): Project 165/13. Informed consent was obtained from all study participants in written form after participants read written study information materials and had the opportunity to clarify any questions.
: Not applicable.
: The authors declare that they have no competing interests.
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