Pedianet is an independent network of family paediatricians established in 1998 to collect information from outpatient family paediatricians in Italy for clinical and epidemiological research (e.g., pharmacovigilance studies, studies on prescribing patterns, and studies of the efficiency of health services). The Pedianet database’s beginning dates back to January 2000. The Pedianet system has the advantage of collecting data at a population level as a by-product of routine activities, therefore generating a far larger quantity of data than ad hoc studies