1 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Department of Pediatrics, Scientific Institute "Casa Sollievo della Sofferenza", University of Foggia, Foggia, Italy. Electronic address: mpm@unifg.it.
2 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Department of Pediatrics, Medical School of Split, University Hospital of Split, Split, Croatia.
3 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Russian Academy of Pediatrics, Department of Pediatrics, University of Moscow, Moscow, Russia.
4 Department of Biomedical Sciences, University of Foggia, Foggia, Italy.
5 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Department of Pediatrics, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
6 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Department of Pediatrics, Cerrahpasa Medical Faculty, University of Istanbul, Istanbul, Turkey.