1 Institute of Biomedical Ethics and History of Medicine, University of Zurich, 8006 Zurich, Switzerland.
2 Department of Nutrition and Food Safety, Technical Standards and Specifications Unit, Health Products Policy and Standards Department, World Health Organization, Geneva, Switzerland.
3 Blood and Other Products of Human Origin, Technical Standards and Specifications Unit, Health Products Policy and Standards Department, World Health Organization, Geneva, Switzerland.
4 Institute of Biomedical Ethics and History of Medicine, University of Zurich, 8006 Zurich, Switzerland. Electronic address: [email protected].