1. Department of Palliative Medicine, University Hospital Bonn, Bonn, Germany.
2. Division of Pharmacoepidemiology & Clinical Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, the Netherlands.
3. Institute of General Medicine, Hannover Medical School, Hannover, Germany.
4. Help the Hospices, London, United Kingdom.
5. Independent Pharmaceutical Consultant, Lopik, The Netherlands.
6. Division of Health Research, International Observatory on End-of-Life Care, Lancaster University, Lancaster, United Kingdom.