1. Pediatric Oncology Unit, Department of Pediatrics; University Hospital Reina Sofía; Córdoba; Spain
2. Department of Pathology; University Hospital Germans Trías i Pujol, Badalona; Barcelona; Spain
3. Pediatric Neurology Unit, Department of Pediatrics; University Hospital Reina Sofía; Córdoba; Spain
4. Molecular Biology Centre GENETAQ; Málaga; Spain
5. Pediatric Intensive Care Unit, Department of Pediatrics; University Hospital Reina Sofía; Córdoba; Spain
6. Neonatology, Department of Pediatrics; University Hospital Reina Sofía; Córdoba; Spain