Postauthorization Safety Study of the Long-Term Safety and Efficacy of Repeat Administration of Darvadstrocel in Patients With Crohn's Disease and Complex Perianal Fistula

The main aim is to check the long term side effects of a repeat treatment of darvadstrocel and to see if that treatment improves symptoms of Crohn's disease and complex perianal fistula. Participants will attend 8 clinic visits and will receive 1 treatment of darvadstrocel at the third visit. A magnetic resonance imaging (MRI) will be performed several times during the study.