1. Department of Medicine and Centro de Investigación del Cáncer (Instituto de Biología Molecular y Celular del Cáncer, Consejo Superior de Investigaciones Científicas/Universidad de Salamanca) and Department of Hematology, University Hospital, Instituto de Investigación Biomédica de Salamanca and University of Salamanca, Salamanca, Spain;
2. Hematology Department, Hospital del Mar, Barcelona, Spain;
3. Clinical Hematology Department, Institut Català d'Oncologia-Hospital Germans Trias i Pujol, Jose Carreras Research Institute, Badalona, Universitat Autonoma de Barcelona, Barcelona, Spain;
4. Hematology Department, Infanta Leonor Hospital, Madrid, Spain;
5. Hematology Department, University Hospital Fundación Alcorcón, Madrid, Spain;
6. Hematology Department, University Institute Parc Taulí, Sabadell, Barcelona, Spain;
7. Hematology Department, Institut Català d'Oncologia, Hospital Duran i Reynals, University of Barcelona, Institut d'Investigació Biomèdica de Bellvitge, Barcelona, Spain;
8. Hematology Department, University Hospital of Santiago, Santiago de Compostela, Spain;
9. Hematology Department, University Hospital Puerta de Hierro, Majadahonda, Madrid, Spain;
10. Hematology Department, Clinic University Hospital, Zaragoza, Spain;
11. Hematology Department, Hospital of Navarra, Pamplona, Spain;
12. Hematology Department, Marqués de Valdecilla University Hospital, Faculty of Medicine, University of Cantabria, Santander, Spain;
13. Hematology Department, Hospital Basurto, Bilbao, Spain;
14. Hematology Department, Sant Joan de Deu Hospital, Manresa, Spain;
15. Hematology Department, Hospital Son Llatzer, Mallorca, Spain; and
16. Hematology Department, Vega Baja Hospital, Orihuela, Alicante, Spain