| umls-concept:C1516476 | skos:definition | NCI: An NCI-supported clinical cooperative group dedicated to conduct clinical research on childhood cancer, in 2001 was merged with the National Wilms Tumor Study Group, the Pediatric Oncology Group and the Intergroup Rhabdomyosarcoma Study Group to form a new national organization, the Children's Oncology Group. | lld:umls |
