1. King's College London, Cicely Saunders Institute, Department of Palliative Care; Policy & Rehabilitation; London; SE5 9PJ; UK
2. Barcelona Centre for International Health Research (CRESIB - Hospital Clínic); Universitat de Barcelona; Barcelona; Spain
3. Centre for Health Studies and Research; University of Coimbra (CEISUC); Coimbra; Portugal
4. Istituto di Ricerca in Medicina Palliativa; Fondazione Lino Maestroni - ONLUS; Cremona; Italy
5. University of Antwerp; Antwerp; Belgium