1. Department Hospital of Woman and Child, Pediatric Unit, IRCCS AOU di Bologna Policlinico di S.Orsola, 40138 Bologna, Italy
2. Metropolitan Laboratory, AUSL Bologna, 40124 Bologna, Italy
3. Observatory for Health Provincial Government, 39100 Bolzano, Italy
4. Marienklinik, 39100 Bolzano, Italy
5. Department of Medical and Surgical Sciences, University of Bologna, 40126 Bologna, Italy