Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (CR33I3_140655 CR33I3_1166591, #166625)
Text and Data Mining valid from 2020-03-06
Received: 3 December 2019
Accepted: 2 March 2020
First Online: 6 March 2020
Ethics approval and consent to participate
: Informed consent was obtained from all the study participants or from their legal representatives and is in accordance with the declaration of Helsinki.
: The authors declare that they have no competing interests.