1. Department of Hematology, Universitaire Ziekenhuizen Leuven, Leuven, Belgium
2. Department of Hematology, AZ Sint-Jan Brugge, Brugge, Belgium
3. Department of Hematology, CHU UCL Namur, Yvoir, Belgium
4. Department of Hematology, Centre Hospitalier Universitaire Liège, Liège, Belgium
5. Department of Hematology, Cliniques Universitaire St Luc, Bruxelles, Belgium