5Cotan RS, Kumar V, Robbin SL. Weoplasia. In: Robbins pathologic basis of disease. 5th ed. Philadedelphia: WB Saunders,1994. 241.
6Ferlay J, Bray F, Pisani P, et al. Globocan 2000: Cancer incidence,mortality and prevalence worldwide. International Agency for Research on Cancer, Lyon, 2001.
7Geddes M, Balzi D, Buiatti E, et al. Cancer mortality in Italian migrants to Canada. Tumori, 1994, 80:19-23.
8National Board of Health and Welfare. Cancer incidence in Sweden 1997. Statistic. Halsa och sjukdomar 1999,8. Stockholm, Center of Epidemiology, 1999.1-116.
9Parkin DM, Muir CS, Whelan SL, et al. Cancer incidence in five continents. Vol. Ⅶ IARC Sci Pub. No. 120. Lyon, International Auenc for Research on Cancer, 1997. 330-333.
10Weiderpass E, Partanen T, Kaaks R, et al. Occurrence, trend and environmental etiology of pancreatic cancer. Scand J Work Environ Health, 1998,24 : 165-174.
