1. International Commission on Radiological Protection (ICRP), 1990 Recommendations of the International Commission on Radiological Protection, Pub. No. 60. Ann ICRP, 1991. 21(1–3):1–201
2. National Research Council (NRC), Committee on the Biological Effects of Ionizing Radiations (BEIR), Health risks from exposure to low levels of ionizing radiation. BEIR VII. 2006, Washington, DC: NRCUSNA Press
3. United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR), Sources and effects of ionizing radiation: UNSCEAR 2000 report to the General Assembly, with scientific annexes. 2000, New York: United Nations
4. Clonal analysis of human colorectal tumors;Fearon;Science,1987
5. A genetic model for colorectal tumorigenesis;Fearon;Cell,1990