Vedolizumab-4081: Infection Outcomes among Advanced Therapy-naive Older Adult US Patients With UC/CD Initiating ENTYVIO, TNF-alpha Inhibitors, or Ustekinumab: A Retrospective Observational Matched-Cohort Study Using Medicare Claims Data, 2016-2025 First published 17/12/2025 Last updated 19/01/2026 EU PAS number:EUPAS1000000767 Study Ongoing