1 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Italian Society of Pediatrics, Rome, Italy.
2 Italian Society of Pediatrics, Rome, Italy.
3 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Russian Public Academy of Pediatrics, Moscow, Russian Federation.
4 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Romanian Social Pediatric Society, Cluj, Romania.
5 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Croatian Society of Pediatrics, Zagreb, Croatia.
6 Department of Biomedical Sciences, University of Foggia, Foggia, Italy.
7 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Scientific Institute "Casa Sollievo della Sofferenza", Academic Group for Clinical Research in Pediatrics, Foggia, Italy.
8 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Turkish Pediatric Association, Istanbul, Turkey.
9 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Italian Federation of Pediatricians, Rome, Italy.
10 Heim Pál National Pediatric Institute, Budapest, Hungary; Hungarian Pediatric Association, Budapest, Hungary.
11 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Hungarian Pediatric Association, Budapest, Hungary.
12 European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Scientific Institute "Casa Sollievo della Sofferenza", Academic Group for Clinical Research in Pediatrics, Foggia, Italy. Electronic address: mpm@unifg.it.