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Exposure to N-nitrosamines and other risk factors for gastric cancer in Costa Rican children
The hypothesis that endogenous chemical nitrosation in the normal stomach in early life could play a crucial role in inducing chronic atrophic gastritis/intestinal metaplasia in later life was tested by applying the ...
National cancer registry, 1980-1983
Legislation making cancer a notifiable disease was introduced in Costa Rica in 1976. At the same time, a National Tumour Registry was established, and collection of data commenced in March 1977. The aims of the National ...