Department of Pain Medicine, Paolo Procacci Foundation, Rome, ITA. Department of Neurology, University of Verona, Verona, ITA. Department of Neurology, University of Cyprus, Nicosia, CYP. Department of Anesthesia, European Institute of Oncology (IEO), Milano, ITA. Department of Life, Health and Environmental Sciences (MESVA), University of L'Aquila, L'Aquila, ITA. Department of Anesthesiology and Pain Management, University of Athens, Athens, GRC.