1. Scientific Information and Documentation Center; Epitech Group; Padua Italy
2. Department of Pharmaceutical and Pharmacological Sciences; University of Padua; Padua Italy
3. Department of Internal Medicine and Rheumatology; Santa Maria Hospital; University of Perugia; Terni Italy
4. Department of Anesthesiology and Pain Medicine; School of Dentistry; LUdeS University; La Valletta Malta
5. Paolo Procacci Foundation and European League Against Pain; Rome Italy
6. Department MESVA; University of L'Aquila; L'Aquila Italy