1. Chen YJ, Yeh SH, Chen JT, Wu CC, Hsu MT, Tsai SF, Chen PJ, Lin CH (2000) Chromosomal changes and clonality relationship between primary and recurrent hepatocellular carcinoma. Gastroenterology 119: 431–440
2. Du Y, Carling T, Fang W, Piao Z, Sheu JC, Huang S (2001) Hypermethylation in human cancers of the RIZ1 tumor suppressor gene, a member of a histone/protein methyltransferase superfamily. Cancer Res 61: 8094–8099
3. Esteller M, Hamilton SR, Burger PC, Baylin SB, Herman JG (1999a) Inactivation of the DNA repair gene O6-methylguanine-DNA methyltransferase by promoter hypermethylation is a common event in primary human neoplasia. Cancer Res 59: 793–797
4. Esteller M, Sanchez-Cespedes M, Rosell R, Sidransky D, Baylin SB, Herman JG (1999b) Detection of aberrant promoter hypermethylation of tumor suppressor genes in serum DNA from non-small cell lung cancer patients. Cancer Res 59: 67–70
5. Esteller M, Sparks A, Toyota M, Sanchez-Cespedes M, Capella G, Peinado MA, Gonzalez S, Tarafa G, Sidransky D, Meltzer SJ, Baylin SB, Herman JG (2000) Analysis of adenomatous polyposis coli promoter hypermethylation in human cancer. Cancer Res 60: 4366–4371