Though there was an increasing trend of ASIR of NPC, the downward trend was evident in ASDR and age-standardized DALY rate.
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Nasopharyngeal Carcinoma Burden and Its Attributable Risk Factors in China: Estimates and Forecasts from 1990 to 2050.
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The sentences
We found that both rates showed a trend of increasing first and then decreasing with the increase in age groups.