As shown in Table 1 , the incidence of NPC patients with diabetes showed an increasing trend, while the incidence of NPC patients with smoking showed a decreased trend during the four calendar periods.
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Patterns of Failure and Survival Trends in 3,808 Patients with Stage II Nasopharyngeal Carcinoma Diagnosed from 1990 to 2012: A Large-Scale Retrospective Cohort Study.
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