1 Institute of Pediatrics, Catholic University Medical School, Rome, Italy; Service of Pediatrics, Campus Bio-Medico University, Rome, Italy.
2 Service of Pediatrics, Campus Bio-Medico University, Rome, Italy.
3 European Pediatric Association/Union of National European Pediatric Societies and Associations, Berlin, Germany; Russian Medical Research and Scientific Medical University of Moscow, Russian Federation, Moscow, Russia.
4 European Pediatric Association/Union of National European Pediatric Societies and Associations, Berlin, Germany; University of Istanbul, Istanbul University Cerrahpaşa, Medical Faculty, Istanbul, Turkey.
5 European Pediatric Association/Union of National European Pediatric Societies and Associations, Berlin, Germany; Medical School of Split, University Hospital of Split, Split, Croatia.
6 European Pediatric Association/Union of National European Pediatric Societies and Associations, Berlin, Germany; Italian Federation of Pediatricians, Rome, Italy.
7 Department of Biomedical Sciences, University of Foggia, Foggia, Italy.
8 European Pediatric Association/Union of National European Pediatric Societies and Associations, Berlin, Germany; 2nd Pediatric Clinic, University of Medicine and Pharmacy Iuliu Hatieganu Cluj-Napoca, Romania.
9 Department of Pediatrics, Scientific Institute "Casa Sollievo della Sofferenza", University of Foggia, Foggia, Italy.
10 European Pediatric Association/Union of National European Pediatric Societies and Associations, Berlin, Germany; Department of Pediatrics, Scientific Institute "Casa Sollievo della Sofferenza", University of Foggia, Foggia, Italy. Electronic address: mpm@unifg.it.