1. Laboratory of Pharmacology, National Institute of Paediatrics, Mexico City, Mexico;
2. Epidemiological Surveillance Unit, National Institute of Respiratory Diseases, Mexico City, Mexico;
3. Radiology and Imaging Service, National Institute of Paediatrics, Mexico City, Mexico;
4. Oncology Telethon Children’s, Queretaro City, Mexico;
5. Department of Oncology Service, National Institute of Paediatrics, Mexico City, Mexico;
6. Division of Immunogenetics, Department of Transplants, National Institute of Medical Sciences and Nutrition Salvador Zubiran, Mexico City, Mexico;
7. Department of Pathology, National Institute of Neurology and Neurosurgery Manuel Velasco Suarez, Mexico City, Mexico;
8. Department of Biomedical Oncology Laboratory, National Institute of Respiratory Diseases, Mexico City, Mexico