[1] Pediat Clin, I-25123 Brescia, Italy
[2] A Nocivelli Inst Mol Med, I-25123 Brescia, Italy
[3] Osped Nocera Inferiore, UOC Pediat TIN, Salerno, Italy
[4] Spedali Civil Brescia, UOC Oncoematol Pediat, I-25125 Brescia, Italy
[5] Univ Pavia, Dipartimento Oncoematol Pediat, IRCCS Osped Pediat Bambino Gesu, I-27100 Pavia, Italy
[6] Univ Lyon 1, Hosp Civils Lyon, Inst Hematol & Oncol Pediat, Serv Immuno Hematol Pediat, F-69365 Lyon, France
[7] Univ Paris 11, INSERM, LERMIT, UMR S996, Clamart, France
[8] Hop Trousseau, AP HP, Serv Hemato Oncol Pediat Registre Neutropenies Co, F-75571 Paris, France