[文献资料]参 考 文 献

Causes of cancer in the world：comparative risk assessment of nine behavioural and environmental risk factors .Effect of combined folic acid，vitamin B6，and vitamin B12 on cancer risk in women A randomized trial .28 .陈竺.全国第三次死因回顾抽样调查报告.北京：中国协和医科大学出版社，2008：4 ......