Katleen De Preter1, Jo Vandesompele1, Pierre Heimann2, Nurten Yigit1, Siv Beckman3, Alexander Schramm4, Angelika Eggert4, Raymond L Stallings5, Yves Benoit6, Marleen Renard7, Anne De Paepe1, Geneviève Laureys6, Sven Påhlman3 and Frank Speleman1 
1Center for Medical Genetics, Ghent University Hospital, De Pintelaan, B-9000 Ghent, Belgium
2Department of Medical Genetics, University Hospital Erasme, Lenniksebaan, B-1070 Brussels, Belgium
3Division of Molecular Medicine, Department of Laboratory Medicine, Lund University, University Hospital MAS, SE-20502 Malmö, Sweden
4Department of Pediatric Oncology and Hematology, University Hospital of Essen, Hufelandstr., Essen 45122, Germany
5Children's Cancer Research Institute, University of Texas Health Science Center, Floyd Curl Drive, Mail Code 7784, San Antonio, Texas 78229-3900, USA
6Department of Pediatrics, Ghent University Hospital, De Pintelaan, B-9000 Ghent, Belgium
7Department of Pediatrics, UZ Gasthuisberg, Herestraat, B-3000 Leuven, Belgium