Efficacy and Safety of Long-Term Thiopurine Maintenance Treatment in Japanese Patients With Ulcerative Colitis

Financial support: This work was supported by the Japanese Society for the Promotion of Science "KAKENHI" Grants-in-Aid for Scientific Research (Nos. 24590941, 25860532, 26460967, and 26893122) and Health and Labour Sciences Research Grants for Research on Rare and Intractable Disease from the Ministry of Health, Labour and Welfare, Japan. Conflict of interest: None.