Classification of surgical causes of and approaches to the chronically failing ileoanal pouch.

"Declarations Conflict of interestNone related to the current paper. EMP, MR, CB had none to declare. RH: Educational Grant: Stryker. Consulting fees: Applied Medical. Speaker fees: Applied Medical, Medtronic, Johnson & Johnson. Stock options: SurgEase. MD: Advisory fees: Echo Pharma, Alimentiv (formerly Robarts Clinical Trials). Unrestricted Grant: Pfizer. Speaker fees: Janssen, Merck & Co., Inc., Pfizer, Takeda, Tillotts Pharma, Galapagos, BMS. Nonfinancial support: Dr. Falk Pharma. WB: Speaker fees: Takeda, Johnson & Johnson, Medtronic, Braun. Grant: VIFOR, Braun. Ethics approval statementAccording to local law and the Medical Ethical Committee at the Amsterdam UMC, ethical approval was waived for this retrospective study. Patient informed consent statementAll eligible patients received an opt-out letter and could withdraw permission to collect data for this study. Conflict of interest None related to the current paper. EMP, MR, CB had none to declare. RH: Educational Grant: Stryker. Consulting fees: Applied Medical. Speaker fees: Applied Medical, Medtronic, Johnson & Johnson. Stock options: SurgEase. MD: Advisory fees: Echo Pharma, Alimentiv (formerly Robarts Clinical Trials). Unrestricted Grant: Pfizer. Speaker fees: Janssen, Merck & Co., Inc., Pfizer, Takeda, Tillotts Pharma, Galapagos, BMS. Nonfinancial support: Dr. Falk Pharma. WB: Speaker fees: Takeda, Johnson & Johnson, Medtronic, Braun. Grant: VIFOR, Braun."

"Funding None."