1. IRCCS Neuromed; Pozzilli (Isernia) Italy
2. European Brain Research Institute “Rita Levi Montalcini,”; Rome Italy
3. CNR; Rome Italy
4. IRCCS Santa Lucia Foundation; Rome Italy
5. C. Mondino National Institute of Neurology Foundation; Pavia Italy
6. University of Rome “La Sapienza,” Polo Pontino; Latina Italy
7. IRCCS Stella Maris; Pisa Italy
8. Headache Research Unit, Citadelle Hospital; University of Liège; Liège Belgium