1. Hematology Department, Institute of Biomedical Research of Salamanca, University Hospital of Salamanca, 37007 Salamanca, Spain
2. Bristol Myers Squibb, Princeton,NJ 08540, USA
3. RTI Health Solutions, Research Triangle Park, NC 27709, USA
4. RTI Health Solutions, 69009 Lyon, France
5. Celgene International Sàrl, a Bristol-Myers Squibb Company, 2017 Boudry, Switzerland
6. Department of Haematology, Oncology, and Clinical Immunology, University Hospital of Dusseldorf, 40225 Dusseldorf, Germany