1. 1. American Cancer Society. Global cancer facts and figures 2007. http://www.cancer.org/downloads/STT/Global_Facts_and_ Figs._2007_rev2.pdf. Accessed 16 Jun 2009
2. 2. Ministry of Health, Labor and Welfare, Japan. Figures for vital statistics in 2007. http://www.mhlw.go.jp/toukei/saikin/hw/jinkou/kakutei07/hyo7.html. Accessed 16 Jun 2009