1Innsbruck Institute of Patient-centered Outcome Research (IIPCOR), Innsbruck, Austria
2Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatry II, Medical University of Innsbruck, Innsbruck, Austria
3The Research Unit, Department of Palliative Medicine, Bispebjerg Hospital, Copenhagen, Denmark
4Department of Nuclear Medicine, Medical University of Innsbruck, Innsbruck, Austria