1. Expanded Newborn Screening Laboratory, A.O.U Policlinico “G. Rodolico─San Marco”, 95125 Catania, Italy
2. Department of Drug and Health Sciences, University of Catania, 95125 Catania, Italy
3. InfoBiotech srl, 90143 Palermo, Italy
4. Unit of Clinical Pediatrics, Department of Clinical and Experimental Medicine, University of Catania, 95125 Catania, Italy
5. CNR-Institute of Biomolecular Chemistry, 95126 Catania, Italy