1 Interdisciplinary Department of Medicine, Pediatric Section, Children's Hospital 'Giovanni XXIII', University of Bari "Aldo Moro", 70126, Bari, Italy.
2 Interdisciplinary Department of Medicine, Pediatric Section, Children's Hospital 'Giovanni XXIII', University of Bari "Aldo Moro", 70126, Bari, Italy. fernandacristofori@gmail.com.