1. Tobacco use, cancer causation and public health impact
2. ( 3 ) Peto R, Lopez AD, Boreham J, Thun M. Mortality from smoking in developed countries 1950-2000 (2nd edition). http://www.ctsu.ox.ac.uk/~tobacco/.
3. ( 4 ) Ministry of Health, Labour and Welfare: The National Nutrition Survey in Japan, 2001. Tokyo: Daiichi Shupan (in Japanese).