Funding for this research was provided by:
Text and Data Mining valid from 2019-04-08
Received: 26 March 2018
Accepted: 21 March 2019
First Online: 8 April 2019
Ethics approval and consent to participate
: The project was approved by the Regional Ethical Review Board in Gothenburg, Sweden (reference number 561–12), adhered to the Helsinki Declaration, and registered with ClinicalTrials.gov (identifier: NCT02039596). All volunteers gave written informed consent before entering the study.
: Not applicable.
: The authors declare that they have no competing interests.
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