Funding for this research was provided by:
Anna och Edwin Bergers Stiftelse
The Gyllenstierna Krapperup's Foundation
Received: 6 February 2019
Accepted: 14 May 2019
First Online: 28 May 2019
Ethics approval and consent to participate
: The study was approved by the regional ethical vetting board (# 2014/15), Lund, Sweden.
: All study participants consented to the publication of the results.
: The authors declare that they have no competing interests.
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