1. Institute of Haematology and Transfusion Medicine; Warsaw Poland
2. Sanquin Blood Supply Foundation; Amsterdam the Netherlands
3. Irish Blood Transfusion Service; Dublin Ireland
4. Banc de Sang i Teixits; Barcelona Spain
5. Etablissement Français du Sang; Tours France
6. Lodi Hospital; Lodi Italy
7. Biologicals Quality Control; Rijswijk the Netherlands
8. Lelie Research; Paris France