1 Department of Pediatrics, Hospitalization and Emergency Unit, Health Service of the Principality of Asturias, Hospital Universitario Central de Asturias, 33011, Oviedo, Spain.
2 Department of Radiology, Pediatric Radiology Unit, Health Service of the Principality of Asturias, Hospital Universitario Central de Asturias, 33011, Oviedo, Spain.
3 Department of Pediatrics, Pediatric Intensive Care Unit, Health Service of the Principality of Asturias, Hospital Universitario Central de Asturias, 33011, Oviedo, Spain.
4 Department of Radiology, Interventional Radiology Unit, Health Service of the Principality of Asturias, Hospital Universitario Central de Asturias, 33011, Oviedo, Spain.
5 Department of Urology, Health Service of the Principality of Asturias, Hospital Universitario Central de Asturias, 33011, Oviedo, Spain.
6 Department of Pediatrics, Pediatric Nephrology, Hospital Universitario Central de Asturias, Medical School, Health Service of the Principality of Asturias, University of Oviedo, 33011, Oviedo, Spain. fsantos@uniovi.es.