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Pahor M, Franse LV, Deitcher SR, Cushman WC, Johnson KC, Shorr RI, Kottke-Marchant K, Tracy RP, Somes GW, Applegate WB.Pahor M, et al. Among authors: tracy rp.Circulation. 2002 Jan 29;105(4):457-61. doi: 10.1161/hc0402.102929.Circulation. 2002.PMID: 11815428Clinical Trial.