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Bischoff-Ferrari HA, Shao A, Dawson-Hughes B, Hathcock J, Giovannucci E, Willett WC.Bischoff-Ferrari HA, et al. Among authors: shao a.Osteoporos Int. 2010 Jul;21(7):1121-32. doi: 10.1007/s00198-009-1119-3. Epub 2009 Dec 3.Osteoporos Int. 2010.PMID: 19957164Free PMC article.Review.