Received: 21 September 2018
Accepted: 6 February 2019
First Online: 15 March 2019
Ethics approval and consent to participate
: The study was approved by the Regional Ethics Review Board in Linkoping, Sweden.
: Not applicable.
: No conflicts of interest where declared by the authors. However, Rolf Gedeborg is also employed by the Medical Products Agency, an agency of the Swedish government. The views expressed in this paper may not reflect the views of the Medical Products Agency.
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