[1] Univ Hosp St Etienne, Dept Pediat Hematol, St Etienne 02, France
[2] Univ Hosp St Etienne, Oncol Unit, St Etienne 02, France
[3] Univ St Etienne, Childhood Canc Registry Rhone Alpes Reg, St Etienne 02, France
[4] Jean Monnet Univ, Univ Hosp, PRES Lyon, Host Res Team,EA4607,SNA,EPIS, St Etienne 02, France
[5] Inst Pediat Hematol & Oncol, Lyon, France
[6] Univ Hosp Grenoble, Dept Pediat Hematol, Grenoble 9, France
[7] Univ Hosp Grenoble, Oncol Unit, Grenoble 9, France
[8] Univ Hosp Estaing Clermont Ferrand, Dept Pediat Hematol, Clermont Ferrand, France
[9] Univ Hosp Estaing Clermont Ferrand, Oncol Unit, Clermont Ferrand, France
[10] Hosp Firminy, Dept Internal Med Unit, Firminy, France
[11] Univ St Etienne, Dept Publ Hlth & Med Informat, St Etienne 02, France
[12] Univ Hosp St Etienne, Dept Internal Med Unit, St Etienne 02, France
[13] Univ Hosp Lyon Sud, Dept Internal Med, Pierre Benite, France
[14] Univ Hosp Lyon Sud, Vasc Pathol Unit, Pierre Benite, France