1. Cancer Epigenetics Laboratory, Molecular Pathology Program, Spanish National Cancer Research Center, Melchor Fernandez Almagro 3, 28029 Madrid, Spain.
2. The Hematopathology Section, Laboratory of Anatomic Pathology, Hospital Clinic, Barcelona, Catalonia, Spain.
3. Department of Genetics, University of Navarra, Pamplona, Spain.
4. Medizinische Klinik IV, Aachen, Germany.
5. The Johns Hopkins Oncology Center, Baltimore, Maryland, USA.