1. Department of Science and Research, Centre for Palliative Medicine, University of Bonn, Department of Anaesthesiology, Intensive Care Medicine, Palliative Medicine and Pain Therapy, Malteser Krankenhaus Bonn, Von-Hompesch-Str. 1, 53123 Bonn-Hardtberg, Germany,
2. Institute of Palliative Medicine, Calicut, Kerala, India
3. The University of Texas M. D. Anderson Cancer Center, Houston, USA
4. Department of Science and Research, Centre for Palliative Medicine Bonn, University of Bonn, Malteser Hospital Bonn, Germany
5. International Association of Hospice and Palliative Care, Houston, USA