1. Department of Haematology; Manchester Royal Infirmary; Manchester UK
2. Division of Immunohematology and Transfusion Medicine; Hospital Papa Giovanni XXIII; Bergamo Italy
3. Faculty of Medicine; Academic Medical Center; University of Amsterdam; Amsterdam the Netherlands
4. Division of Hematology; USC Norris Cancer Hospital; Los Angeles CA USA
5. Department of Medical, Oral and Biotechnological Sciences; University ‘G. D'Annunzio’ of Chieti-Pescara; Chieti Italy
6. Department of Vascular Medicine; Academic Medical Center; Amsterdam the Netherlands