Inclusion Criteria:  The below 3 conditions must be met simultaneously.  Patient who can voluntarily consent to this study. Patient who has inflammatory bowel disease. Patient who is aged less than 75 years.  Exclusion Criteria:  a patient meets any of the below conditions.  If a patient has an IBD other than UC and CD. If a patient is vulnerable due to his/her position as an employee of Yeouido St.Mary's hospital or a medical student of the Catholic University of Korea. If a patient is pregnant. Foreign personal who cannot speak Korean.