[1] S Giovanni Calibita Fatebenefratelli Hosp, Natl Inst Hlth, Italian Natl Blood Ctr, Immunohaematol Unit, Rome, Italy
[2] S Giovanni Calibita Fatebenefratelli Hosp, Natl Inst Hlth, Italian Natl Blood Ctr, Transfus Med & Clin Pathol Unit, Rome, Italy
[3] Reg Blood Ctr, Bologna, Italy