RecruitingPhase 2Drug trialClinical Analysis of Naxitamab (hu3F8) in the Treatment of Pediatric High Risk or Refractory/ Relapsed NeuroblastomaThis is an prospective study to evaluate the safety and efficacy of naxitamab monotherapy or combined with chemotherapy or combined with chemotherapy and checkpoint inhibitor in the treatment of pediatric high-risk and refractory/relapsed neuroblastoma in Sun Yat-sen University Cancer Center.