1. Department of Hematology, Hospital General Universitario (H.G.U.) Gregorio Marañón, Madrid, Spain;
2. Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain;
3. Department of Statistics, Universidad Carlos III de Madrid, Madrid, Spain;
4. Department of Oncology and
5. DNA Sequencing and Genotyping Core Facility, H.G.U. Gregorio Marañón, Madrid, Spain;
6. Department of Hematology, Instituto Catalán de Oncología Hospital Josep Trueta, Girona, Spain;
7. Department of Hematology, Hospital Clínic, Institut d’Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain;
8. Department of Hematology, Hospital Clínico de Valencia, Valencia, Spain;
9. Department of Hematology, Hospital Universitario Morales Meseguer, Murcia, Spain;
10. Department of Hematology, Hospital de Salamanca, Salamanca, Spain;
11. Department of Hematology, Hospital Universitario de La Princesa, Madrid, Spain;
12. Department of Haematology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain;
13. Department of Hematology, Hospital Regional de Málaga, Málaga, Spain;
14. Department of Hematology, Hospital Universitario Virgen del Rocío, Seville, Spain;
15. Department of Hematology, Hospital Central de Asturias, Oviedo, Spain;
16. Department of Hematology, Hospital Universitario Son Espases, Palma de Mallorca, Spain;
17. Department of Medicine, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain; and
18. Genomics Unit, H.G.U. Gregorio Marañón/Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain.