参考资料
[1]https://www.cancer.org/cancer/cancer-causes.html
[2]https://www.medicalnewstoday.com/articles/323648[3]https://www.medicalnewstoday.com/articles/325178[4]Yuan C， Morales-Oyarvide V， Babic A，et al.Cigarette Smoking and Pancreatic Cancer Survival.J Clin Oncol. 2017 Mar 30.[5]Rehm J, Shield K. Alcohol consumption. In: Stewart BW, Wild CB, eds. World Cancer Report 2014. Lyon, France: International Agency for Research on Cancer; 2014.[6]《Global patterns in excess body weight and the associated cancer burden》[7]《Excess body weight responsible for nearly four percent of cancers worldwide》[8]https://www.cancer.org/latest-news/sitting-time-linked-to-higher-risk-of-death-from-all-causes.html
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