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Elshorbagy AK, Gjesdal CG, Nurk E, Tell GS, Ueland PM, Nygård O, Tverdal A, Vollset SE, Smith AD, Refsum H.Elshorbagy AK, et al. Among authors: gjesdal cg.Bone. 2009 May;44(5):954-8. doi: 10.1016/j.bone.2008.12.018. Epub 2009 Jan 3.Bone. 2009.PMID: 19168166