1. Oncology Disease Research Unit, Children's Hospital of Mexico, Federico Gomez, Mexico City, Mexico
2. Hemato-Oncology Service, Moctezuma Children's Hospital, Mexico City, Mexico
3. Immunology and Proteomics Laboratory, Hospital Infantil de México, Federico Gómez, Mexico City, Mexico
4. Laboratorio de Oncologia Experimental, Instituto Nacional de Pediatria, S.S.A, Mexico City, Mexico