1. CICAB Clinical Research Centre, Extremadura University Hospital and Medical School, Badajoz, Spain
2. Advanced Molecular Diagnostics Unit, IDI-IRCCS, Rome, Italy
3. Department of Molecular Medicine, Sant’Andrea Medical Center, Sapienza University of Rome, Rome, Italy
4. Regional Referral Headache Center, Sant’Andrea Hospital, Rome, Italy
5. Department of Psychiatry, Harvard Medical School, Boston, MA, USA
6. NESMOS Department, Sapienza University of Rome, Rome, Italy