1. Canary Islands Foundation for Health and Research (FUNCIS); CIBER Epidemiología y Salud Pública (CIBERESP)
2. Canary Islands Foundation for Health and Research (FUNCIS)
3. Service of Evaluation and Planning, Canary Islands Health Service, Canary Islands
4. Service of Evaluation and Planning, Canary Islands Health Service, Canary Islands; CIBER Epidemiología y Salud Pública (CIBERESP)
5. Palliative Care Unit, Hospital Nª Sª de la Candelaria, Tenerife, Canary Islands