Funding for this research was provided by:
Greta och Johan Kocks stiftelser
Alfred Österlunds Stiftelse
Received: 17 January 2018
Accepted: 18 May 2018
First Online: 1 June 2018
Ethics approval and consent to participate
: The study was approved by the Lund University ethical review board (Dnr 2014–276). The need for individual informed consent was waived.
: The authors declare that they have no competing interests.
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