Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (170844, 160136, 162583)
Received: 28 November 2018
Accepted: 30 April 2019
First Online: 18 May 2019
Ethics approval and consent to participate
: Animal tissue removal procedures were approved by the Cantonal Animal Safety Commission of Canton Bern.
: Not applicable.
: The authors declare that they have no competing interests.
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