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Katzan IL, Masaryk TJ, Furlan AJ, Sila CA, Perl J 2nd, Andrefsky JC, Cosgrove DM, Sabik JF, McCarthy PM.Katzan IL, et al. Among authors: perl j 2nd.Neurology. 1999 Mar 23;52(5):1081-4. doi: 10.1212/wnl.52.5.1081.Neurology. 1999.PMID: 10102437