Paolo Cotogni1, Anna De Luca2, Andrea Saini2, Luca Brazzi3. 1. Pain Management and Palliative Care, Department of Anesthesia and Intensive Care, AOU Città della Salute e della Scienza, C.so Bramante 88/90, 10126, Turin, Italy. paolo.cotogni@unito.it. 2. Pain Management and Palliative Care, Department of Anesthesia and Intensive Care, AOU Città della Salute e della Scienza, C.so Bramante 88/90, 10126, Turin, Italy. 3. Department of Surgical Sciences, University of Turin, Turin, Italy.