Funding for this research was provided by:
Region Örebro County
Received: 17 January 2019
Accepted: 4 March 2019
First Online: 29 March 2019
Ethics approval and consent to participate
: The study was approved by the Regional Ethics Committee Review Board of Uppsala, reference number 2016/528.
: Not applicable.
: GJ is a consultant for Novo Nordisk but does not consider this to be a conflict of interest in this work. RT, JA, and LOL declare that they have no competing interests.
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