TELOMERE LENGTH AND TELOMERASE ACTIVITY IN IMMORTALIZED AND MALIGNANTLY TRANSFORMED HUMAN EMBRYONIC ESOPHAGEAL EPITHELIAL CELL LINES BY E6 AND E7 GENES OF HPV 18 TYPE
XU Li-yan, SHEN Zhong-ying, LI En-min, etal .
Carcinogenesis, Teratogenesis & Mutagenesis . 2001, (3): 137 -140 .  DOI: 10.3969/j.issn.1004-616x.2001.03.001