The authors retract the October 15, 2004, paper cited above. Figure 1 in that paper was inappropriately reproduced from a previously published paper, namely Dong SM, Kim HS, Rha SH, Sidransky D. Promoter hypermethylation of multiple genes in carcinoma of the uterine cervix. Clin Cancer Res. 2001;7:1982–1986.

The authors deeply apologize to the authors of that paper and to the scientific community.

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