1. University of Padua; Padua
2. University of Verona; Verona
3. University of Genoa; Genoa
4. University of Rome; Rome
5. IRCCS NEUROMED; Isernia Italy
6. Kings College London; London UK
7. University of Cagliari; Cagliari Italy
8. Hospital de Santa Maria; Lisbon Portugal
9. National Center of Epidemiology and CIBERNED; Madrid Spain
10. University Medical Center Goettingen; Goettingen Germany
11. Université de Toulouse; Toulouse France