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Al-Haifi AA, AlMajed HT, Al-Hazzaa HM, Musaiger AO, Arab MA, Hasan RA.Al-Haifi AA, et al.Glob J Health Sci. 2015 May 17;8(1):107-17. doi: 10.5539/gjhs.v8n1p107.Glob J Health Sci. 2015.PMID: 26234983Free PMC article.