An Open-label Extension Study to Evaluate Long-term Efficacy and Safety of Odevixibat in Children With Biliary Atresia

Inclusion Criteria: * Completion of the 104-week Treatment Period of Study A4250-011 * Signed informed consent by caregiver Exclusion Criteria: * Patients who were not compliant with study drug treatment or procedures in Study A4250-011 as per the investigator's discretion * Any conditions or abnormalities which, in the opinion of the investigator, may compromise the safety of the patient, or interfere with the patient participating in or completing the study * Known hypersensitivity to any components of odevixibat * Patients who are scheduled for a liver transplant or are likely to require a liver transplant in the immediate future based on the investigator's judgment