[1] Azienda Osped Univ Osped Riuniti, Cyst Fibrosis Ctr, Via Conca 71, I-60126 Ancona, Italy
[2] Azienda Osped Univ Integrata, Immunol Unit, Verona, Italy
[3] Azienda Osped Univ Integrata, Dept Pathol & Diagnost, Verona, Italy
[4] Azienda Osped Univ Integrata, Unit Transfus Med, Verona, Italy
[5] Azienda Osped Univ Integrata, Unit Pediat Hematol Oncol, Verona, Italy
[6] Cleveland Clin, Dept Pediat Hematol Oncol & Stem Cell Transplanta, Cleveland, OH 44106 USA