Affiliation: | 1. Chronic Pain Unit, Department of Anaesthesiology, Centro Hospitalar de S?o Jo?o, , Porto, Portugal;2. Faculty of Medicine, University of Porto, , Porto, Portugal;3. Unit of Palliative Care, Leeds Institute of Health Sciences, School of Medicine, University of Leeds, , Leeds, U.K;4. Department of Psychology, Faculty of Medicine, University of Porto, , Porto, Portugal;5. Department of Endocrinology, Diabetes and Metabolism, Centro Hospitalar de S?o Jo?o, , Porto, Portugal |