1. Department of Donor Medicine Research Sanquin Research Amsterdam the Netherlands
2. Center for Philanthropic Studies Vrije Universiteit Amsterdam the Netherlands
3. Department of Sociology Vrije Universiteit Amsterdam the Netherlands
4. Department of Clinical Immunology, Copenhagen University Hospital Rigshospitalet Copenhagen Denmark
5. Department of Social Medicine Academic Medical Center Amsterdam the Netherlands
6. Department of Finance Copenhagen Business School Frederiksberg Denmark
7. Department of Epidemiology Research Statens Serum Institut Copenhagen Denmark
8. Department of Clinical Immunology Aalborg University Hospital Aalborg Denmark