1. CLL Research and Treatment Program, Zucker School of Medicine at Hofstra/Northwell, Lake Success, NY, USA;
2. Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA;
3. Division of Hematology, Department of Internal Medicine, The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA;
4. Department of Haematology, The Leeds Teaching Hospitals, St. James University Hospital, Leeds, UK;
5. Pharmacyclics LLC, an AbbVie Company, Sunnyvale, CA, USA;
6. Department of Medicine, University of California San Diego, Moores Cancer Center, San Diego, CA, USA