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