Funding for this research was provided by:
Medicinska Fakulteten, Lunds Universitet
Received: 11 April 2017
Accepted: 28 January 2018
First Online: 6 February 2018
Ethics approval and consent to participate
: The study was conducted in accordance with the Helsinki Declaration and was approved by the Regional Ethical Review Board in Lund, Sweden (Dnr 2014/412). All participants gave their written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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