[1]Department of Pathology,The Sixth People Hospital of Chongqing,Chongqing 40060,China;
[2]Department of Pathology,Chongqing University of Medical Sciences,Chongqing 400016,China;
[3]Institute of Pathology,Southwest Hospital,Army Medical University,Chongqing 400038,China;
induced differentiation; cervical cancer; immortalization; HPV;