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Spencer JO, Dunn-Walters DK.Spencer JO, et al.J Pathol. 1999 Jan;187(2):158-63. doi: 10.1002/(SICI)1096-9896(199901)187:2<158::AID-PATH226>3.0.CO;2-6.J Pathol. 1999.PMID: 10365090Review.