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Smith AM, Stuart MJ, Wiese-Bjornstal DM, Milliner EK, O'Fallon WM, Crowson CS.Smith AM, et al.Mayo Clin Proc. 1993 Oct;68(10):939-47. doi: 10.1016/s0025-6196(12)62265-4.Mayo Clin Proc. 1993.PMID: 8412359