RecruitingDrug trialVITAS: Atezolizumab in Combination With Chemotherapy for Pediatric Relapsed/Refractory Solid TumorsThis trial is a multi-center, non-randomized, open-label Phase I/II study evaluating the feasibility and efficacy of vincristine, irinotecan, temozolomide, and atezolizumab in children with relapsed/refractory solid tumors.