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Knapp KM, Andrew T, MacGregor AJ, Blake GM, Fogelman I, Spector TD.Knapp KM, et al. Among authors: spector td.J Bone Miner Res. 2003 Aug;18(8):1525-30. doi: 10.1359/jbmr.2003.18.8.1525.J Bone Miner Res. 2003.PMID: 12929943Free article.