1. Religious Service, University Hospital Arnau de Vilanova, Lleida, Spain.
2. Biostatistics Unit, Biomedical Research Institute of Lleida, Lleida, Spain.
3. Palliative Care Service, Institut Català d'Oncologia, Hospitalet de Llobregat, Barcelona, Spain.
4. Department of Surgery, Lleida University and Arnau de Vilanova Lleida University Hospital, Lleida, Spain.