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Representative image of the microsatellite markers used for the loss of heterozygosity analysis. The two LOH positive cases are shown. The formula employed was: LOH index = (N1/N2)/(T1/T2), corresponding to peak areas of N1 = constitutive DNA allele 1; N2 = constitutive DNA allele 2; T1 = tumor DNA allele 1; and T2 = tumor DNA allele 2 [4]. The distance of each marker from the CDH1 locus is approximate
