1. Division of Pediatric Hem/Oncology; National Institute of Pediatrics (NIP); Mexico City Mexico
2. Program of the National Council for the Prevention and Treatment of Childhood Cancer; CENSIA; Mexico City Mexico
3. Department of Pediatric Oncology; National Institute of Pediatrics (NIP); Mexico City Mexico
4. Bone Marrow Transplant Unit; National Institute of Pediatrics (NIP); Mexico City Mexico
5. General Direction of Development of Health Services; Office of the Fund for Protection Against Catastrophic Expenses for Childhood Cancer from the Popular Medical Insurance; Mexico City Mexico