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The present status of idiopathic interstitial pneumonia (IIP) was evaluated from data collected as part of the Financial Support Program for patients with IIP, conducted in Hokkaido since 1979. The prevalence of IIP in 1992 was 4.08/100,000, and the yearly incidence was 1.23/100,000. The ratio of men to women was 1.85/1.0. Under age 55, women were more(More)
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