RecruitingCombination productA Study of Mitomycin-c/ Capecitabine ChemoRadiotherapy Combined With Nivolumab Monotherapy or Ipilumimab and Nivolumab, as Bladder Sparing Curative Treatment for Muscle Invasive Bladder Cancer: the CRIMI StudyA multicenter Phase 1b/2, two stage, open label study of MMC/Capecitabine ChRT combined with nivolumab monotherapy or nivolumab and ipilimumab combination therapy in adult (\>18 years) subjects with non-metastatic muscle invasive bladder cancer that qualify for ChRT with curative intent.