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Leibson CL, Rocca WA, Hanson VA, Cha R, Kokmen E, O'Brien PC, Palumbo PJ.Leibson CL, et al. Among authors: rocca wa.Ann N Y Acad Sci. 1997 Sep 26;826:422-7. doi: 10.1111/j.1749-6632.1997.tb48496.x.Ann N Y Acad Sci. 1997.PMID: 9329716No abstract available.