1. Institut d'Investigacions Biomèdiques August Pi Sunyer (IDIBAPS), Barcelona, Spain;
2. Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain;
3. Hematopathology Section, Department of Anatomic Pathology and
4. Department of Hematology Hospital Clinic of Barcelona, University of Barcelona, Barcelona, Spain;
5. Immunology Unit, Department of Biomedical Science, University of Barcelona, Barcelona, Spain;
6. Institute of Pathology and Neuropathology and Comprehensive Cancer Center Tübingen, University Hospital Tübingen, Eberhard-Karls-University, Tübingen, Germany; and
7. Department of Pathology, Hematopathology Section and Lymph Node Registry, University of Kiel, Kiel, Germany