1. Department of Palliative Medicine, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany.
2. Department of Palliative Medicine, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
3. Trivandrum Institute of Palliative Sciences, Trivandrum, India
4. Department of Palliative Medicine, University Hospital Bonn, Bonn, Germany
5. Centre of Palliative Medicine, Malteser Hospital Bonn/Rhein-Sieg, Germany