1 Clinical Pharmacology and Pharmacovigilance Unit, Regional Pharmacovigilance Center of Catania, G Rodolico-San Marco University Hospital, Catania, Italy.
2 Clinical Pharmacology and Pharmacovigilance Unit, Regional Pharmacovigilance Center of Catania, G Rodolico-San Marco University Hospital, Catania, Italy. f.drago@unict.it.
3 Ethics Committee, Catania 1, G Rodolico-San Marco University Hospital, Via Santa Sofia 78s, 95125, Catania, Italy. f.drago@unict.it.