1. Department of Medicine I, Division of Palliative MedicineMedical University of Vienna Vienna Austria
2. Department of Medicine I, Division of Hematology and HemostaseologyMedical University of Vienna Vienna Austria
3. Section for Medical Statistics, Center for Medical Statistics, Informatics, and Intelligent SystemsMedical University of Vienna Vienna Austria
4. Department of Psychiatry and Psychotherapy, Clinical Division of Social PsychiatryMedical University of Vienna Vienna Austria
5. Department of Medicine I, Division of OncologyMedical University of Vienna Vienna Austria