1. Department of Brain and Behavioral Science University of Pavia Pavia Italy
2. Pavia‐Vigevano Neuropsychological Center Vigevano Italy
3. IRCCS‐Istituto di Ricerche Farmacologiche Mario Negri Milan Italy
4. IRCCS Mondino Foundation Pavia Italy
5. National Centre of Epidemiology National Institute of Health Rome Italy
6. Pain Therapy Service Policlinico Monza Monza Italy
7. Italian Pain Group Milan Italy
8. Department of Drug Sciences University of Pavia Pavia Italy