1. Hellenic Center for Disease Control and Prevention; Hellenic Haemovigilance Centre (SKAE); Athens Greece
2. AHEPA University Hospital Blood Centre; Thessaloniki Greece
3. AHEPA University Hospital Thalassaemia Unit; Thessaloniki Greece
4. Rio University Hospital Thalassaemia Unit; Patras Greece
5. Rio University Hospital Blood Centre; Patras Greece
6. University Hospital Blood Centre and Thalassaemia Unit; Ioannina Greece
7. Venizeleio General Hospital; Thalassaemia Unit; Heraklion Greece
8. Venizeleio General Hospital Blood Centre; Heraklion Greece
9. Korinthos General Hospital Blood Bank; Korinthos Greece
10. Korinthos General Hospital Thalassaemia Unit; Korinthos Greece
11. Vostaneio General Hospital Thalassaemia Unit; Lesvos Greece