1. Unit of Clinical Pharmacology, Department of Biomedical and Clinical Sciences, University Hospital “Luigi Sacco” Università di Milano, 20157 Milan, Italy
2. Scientific Institute, IRCCS Eugenio Medea, 23842 Bosisio Parini, Lecco, Italy
3. Pharmaceutical Service, Azienda Sanitaria Locale di Bergamo, 24100 Bergamo, Italy
4. Family Pediatricians, Territorial Health Service of Bergamo, 24100 Bergamo, Italy