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Unsgaard-Tøndel M, Vasseljen O, Woodhouse A, Morkved S.Unsgaard-Tøndel M, et al. Among authors: vasseljen o.Glob J Health Sci. 2016 Sep 1;8(9):54311. doi: 10.5539/gjhs.v8n9p107.Glob J Health Sci. 2016.PMID: 27157173Free PMC article.