Inclusion Criteria:  Diagnosed with moderate to severe CD or UC established for at least 6 months prior to Day 1 appointment, based on clinical, endoscopic or image criteria. Participants aged 18 years or older (at the time of diagnosis of moderate to severe UC or CD).  Exclusion Criteria:  Has indeterminate or not classified colitis. Mental incapacity, unwillingness or language barriers precluding adequate understanding or cooperation.