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Loftus EV Jr, Tremaine WJ, Nelson RA, Shoemaker JD, Sandborn WJ, Phillips SF, Hasan Y.Loftus EV Jr, et al. Among authors: sandborn wj.Mayo Clin Proc. 1997 Jul;72(7):616-20. doi: 10.1016/S0025-6196(11)63566-0.Mayo Clin Proc. 1997.PMID: 9212762Clinical Trial.