1. Department of Hematology; Geneva University Hospital; Geneva; Switzerland
2. Department of Hematology; University Hospital La Princesa; Madrid; Spain
3. Department of Hematology; Henri Mondor Teaching Hospital; Assistance Publique-Hopitaux de Paris and Paris Est-Créteil University; Créteil; France
4. Department of Haematology; Karolinska University Hospital and Division of Haematology; Department of Medicine; Karolinska Institutet/Huddinge; Stockholm; Sweden