[1] Charles Univ Prague, Dept Paediat Haematol & Oncol, Prague, Czech Republic
[2] Motol Univ Hosp, Prague, Czech Republic
[3] Inst Hematol & Blood Transfus, Prague, Czech Republic
[4] Grp Hosp Pitie Salpetriere, Dept Virol, Paris, France
[5] Dept Clin Biochem & Diagnost, Hradec Kralove, Czech Republic
[6] Univ Hosp Hradec Kralove, Dept Haematol & Internal Med, Hradec Kralove, Czech Republic
[7] Motol Univ Hosp, Dept Paediat Haematol & Oncol, Prague, Czech Republic
[8] Inst Hematol & Blood Transfus, Dept Clin Haematol, Prague, Czech Republic