From the Israel National Haemophilia Centre, Sheba Medical Centre, Tel-Hashomer, Israel (G.K.); Department of Pediatric Hematology/Oncology, University Hospital of Münster, Münster, Germany (L.K.L., R.D.S., U.N.-G.); Division of Hematology, University Children’s Hospital, Zurich, Switzerland (M.A.); Department of Pediatrics, Hematology/Oncology/BMT, and the Mountain States Regional Hemophilia and Thrombosis Center, University of Colorado, and Children’s Hospital, Denver/Aurora, Colo (T.B., N.A.G.,... (At 2010-04-27)