1. Department of Biomedical Sciences, Clinical Metabolomics Unit, University of Cagliari, 09124 Cagliari, Italy
2. Department of Medical Science and Public Health, University of Cagliari, 09124 Cagliari, Italy
3. Department of Health Science, “Magna Graecia” University of Catanzaro, 88100 Catanzaro, Italy
4. Multiple Sclerosis Center, Binaghi Hospital, ASSL Cagliari, 09126 Cagliari, Italy