1. Palliative Care Service, Institut Català d'Oncologia, Universitari de Bellvitge Hospital, L'Hospitalet de Llobregat, Barcelona, Spain
2. Palliative Care Research Group, Bellvitge Biomedical Research Institute, Universitari de Bellvitge Hospital, L'Hospitalet de Llobregat, Barcelona, Spain
3. San Diego Hospice, Institute for Palliative Medicine, San Diego, California
4. Txagorritxu Hospital, Vitoria, Spain.