Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (32003B_135381, 320030L_144100)
Text and Data Mining valid from 2018-10-25
Received: 26 June 2018
Accepted: 19 October 2018
First Online: 25 October 2018
Compliance with ethical standards
: The manuscript does not contain clinical studies or patient data. The Ethical Committee of the University of Bern had approved the study that is in concordance with the Declaration of Helsinki, and all persons gave their informed consent prior to inclusion of the study.
: The authors declare that they have no conflict of interest.