1. Department of Hematology, Hospital del Mar, Barcelona, Spain;
2. Department of Hematology, Hospital Durans i Reynals, Barcelona, Spain;
3. Department of Hematology, Clínica Universitaria de Navarra, Pamplona, Spain;
4. Department of Hematology, Hospital Central de Asturias, Asturias, Spain;
5. Department of Hematology, Hospital Son Llatzer, Mallorca, Spain;
6. Department of Hematology, Hospital Universitario Mutua de Terrassa, Terrassa, Spain;
7. Department of Hematology, Hospital Universitario La Paz, Madrid, Spain;
8. Department of Hematology, Complejo Universitario de Santiago, Santiago de Compostela, Spain;
9. Department of Hematology, Hospital Germans Trias i Pujol, Badalona, Spain;
10. Department of Hematology, MD Anderson Cancer Center, Madrid, Spain;
11. Department of Hematology, Hospital Universitario de Canarias, Tenerife, Spain;
12. Department of Hematology, Hospital Fundación Alcorcón, Alcorcón, Spain;
13. Department of Hematology, Hospital Universitario 12 de Octubre, Madrid, Spain;
14. Department of Hematology, Hospital Morales Meseguer, Murcia, Spain;
15. Department of Hematology, Hospital Clínico Lozano Blesa, Zaragoza, Spain;
16. Department of Hematology, Hospital Universitario La Princesa, Madrid, Spain;
17. Department of Hematology, Hospital Marqués de Valdecilla, Santander, Spain;
18. Department of Anatomic Pathology, Hospital Universitario Miguel Servet, Zaragoza, Spain;
19. Department of Anatomic Pathology, MD Anderson Cancer Center, Madrid, Spain; and
20. Department of Hematology, Hospital Clínico de Salamanca, Salamanca, Spain