1. ISAL Foundation, Institute for Research on Pain, 47921 Rimini, Italy
2. Anesthesiology and Pain Therapy Unit, Santa Chiara University Hospital, 56126 Pisa, Italy
3. ASPHI Foundation Onlus, 40126 Bologna, Italy
4. Comitato Fibromialgici Uniti (CFU) Odv, 40055 Castenaso (Bologna), Italy
5. Centre of Reference for Behavioral Sciences and Mental Health, Istituto Superiore di Sanità (Italian National Institute of Health), 00161 Rome, Italy