1. School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Peru,
2. School of Medicine, Universidad Nacional Mayor de San Marcos, Lima, Peru,
3. Department of Pediatric Endocrinology, Hospital Nacional Edgardo Rebagliati Martins, Lima, Peru
4. Department of Pediatric Neurosurgery, Hospital Nacional Edgardo Rebagliati Martins, Lima, Peru.