Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (PP00P3_157448)
Received: 10 September 2018
Accepted: 31 January 2019
First Online: 20 February 2019
Ethics approval and consent to participate
: Both study cohorts were approved by the local ethics committees (EKOS 16/079 respectively EK 647, EK800), and partly funded by the University Research Priority Program (URPP). Both studies were carried out in accordance with the Declaration of Helsinki principles.
: Not needed on submission.
: The authors declare that they have no competing interests.
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