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Bernardshaw SV, Dolva Sagedal LH, Michelet KM, Brudvik C.Bernardshaw SV, et al.Scand J Prim Health Care. 2019 Jun;37(2):165-173. doi: 10.1080/02813432.2019.1608041. Epub 2019 May 3.Scand J Prim Health Care. 2019.PMID: 31050312Free PMC article.Clinical Trial.