1. Coordinating Haemovigilance Centre
2. Hellenic Centre for Disease Control and Prevention; Athens, Greece
3. AHEPA University Hospital Blood Centre Thessaloniki; Thessaloniki, Greece
4. National Histocompatibility Centre
5. Panteion University of Social and Political Sciences; Athens, Greece
6. Arboviruses National Reference Laboratory; Aristoteleio University; Thessaloniki, Greece
7. Laiko General Hospital Blood Establishment; Athens, Greece
8. Rio University Hospital Blood Centre; Patras, Greece
9. Tzanio General Hospital Blood Establishment; Piraeus, Greece
10. Asclepieio General Hospital Blood Establishment; Voula, Greece
11. Evangelismos General Hospital Blood Establishment; Athens, Greece
12. Veria General Hospital Blood Establishment; Imathia, Greece
13. Katerini General Hospital Blood Establishment; Pieria, Greece
14. Department of Hygiene and Epidemiology; University of Thessaly; Larissa Greece