A correlation study on urinary excretion of N-nitroso compounds and cancer mortality in China: interim results.
Samples of 12-h overnight urine were collected from approximately 40 male adults in each of the 26 counties of China. Two urine specimens were collected from each subject--one after a loading dose of proline and ascorbic acid and another after a loading dose of proline only. Levels of N-nitrosamino acids, nitrite and nitrate were measured in urine samples and correlated with cancer mortality per 100,000 male subjects in the truncated age range 35-64 years. Preliminary results show no clear co...Expand abstract
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