[1] Hop Univ Geneve, Serv Hepatol Pediat, Geneva, Switzerland
[2] Univ Paris Sud, Hop Bicetre, Serv Hepatol & Transplantat Hepat Pediat, Orsay, France
[3] Hop Univ Geneve, Unite Oncohematol Pediat, Geneva, Switzerland
[4] Univ Versailles St Quentin, CHU R Poincare, AP HP, Serv Pharmacol Toxicol,Fac Med,PIFO, 104 Bvd R Poincare, F-92380 Garches, France
[5] Hop Univ Geneve, Serv Anat Pathol, Geneva, Switzerland
[6] Univ Paris Sud, Hop Bicetre, Serv Anatomopathol, Orsay, France
[7] Univ Versailles SQY, EA4340, Boulogne, France
[8] Trousseau Hosp, French Reference Ctr Langerhans Cell Histiocytosi, Paris, France