Nationwide epidemiological survey of chronic pancreatitis in Japan: introduction and validation of the new Japanese diagnostic criteria 2019

To provide updated clinico-epidemiological information on chronic pancreatitis (CP) in Japan. We conducted a two-stage nationwide epidemiological survey; the number of CP patients was estimated in the first-stage survey, and their clinical features were examined in the second-stage survey. We surveyed patients with CP who had visited hospitals in 2016 and were diagnosed according to the Japanese diagnostic criteria 2009 (DC2009). Furthermore, we...