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Abstract In order to study the effect of viruses and tumor promoters on the tumorigenicity of the esophagus, human embryonic esophageal epithelial cells were infected with human papilloma virus HPV18 E6E7-AAV in synergy with 12-O-tetradecanoylphorbol 13-acetate (TPA) to observe their malignant transformation. The cultured esophageal epithelial cells incubated with HPV18 E6E7-AAV were divided into...
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