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Estimation of expected prevalence of pancreatic cystic neoplasm. The expected nationwide number of men in their 30 seconds with pancreatic cystic neoplasms (E30) was calculated from the age-specific prevalence rate of pancreatic cystic neoplasms in men in their 30 seconds (C30). The expected nationwide prevalence rate in men was then derived from the ratio of the sum of numbers of men in each decade to the total nationwide number of men with pancreatic cystic neoplasms.
