5Jemal A, Tiwari R C, Murray T, et al. Cancer statistics [J]. CA Cancer J Clin, 2004,54(1):8.
6Shah S G, Pearson H J, Moss S, et al. Magnetic endoscope imaging: a new technique for localizing colonic lesions [J]. Endoscopy, 2002,34 (11):900- 904.
7FERLAY J,BRAY F,PISANI P,et al.GLOBOCAN 2000:cancerincidence,mortality and prevalence worldwide[R].Lyon:IARC,2001.