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Bjørkløf GH, Kirkevold M, Engedal K, Selbæk G, Helvik AS.Bjørkløf GH, et al.Int J Qual Stud Health Well-being. 2015 Jun 26;10:27187. doi: 10.3402/qhw.v10.27187. eCollection 2015.Int J Qual Stud Health Well-being. 2015.PMID: 26119368Free PMC article.