1. Department of Surgery University of Groningen, University Medical Center Groningen Groningen the Netherlands
2. Research Group Nursing Diagnostics Hanze University of Applied Sciences Groningen Groningen the Netherlands
3. Department of Music Therapy University of Music and Performing Arts Vienna Vienna Austria
4. University Center for Geriatric Medicine, University of Groningen, University Medical Center Groningen Groningen the Netherlands
5. Department of Surgical Oncology University of Groningen, University Medical Center Groningen Groningen the Netherlands