1. Cancer Statistics, 2005
2. Cancer Statistics, 2006
3. Cao KJ, Ma GS, Liu YL, Wan DS. [Incidence of colorectal cancer in Guangzhou City from 2000 to 2002]. Ai Zheng 2009;28:441-444.
4. Changes on the disease pattern of primary colorectal cancers in Southern China: a retrospective study of 20 years
5. Jiang SX, Wang XS, Geng CH, Wang GY. Altering trend of clinical characteristics of colorectal cancer: a report of 3,607 cases. Ai Zheng 2009;28:54-56.