1. National Cancer Institute, Bethesda, MD
2. Hotel Dieu de Paris, Paris, France
3. Massachusetts General Hospital, Boston, MA
4. University of Wurzburg, Wurzburg, Germany
5. Hopital Necker, Paris, France
6. University of Chicago Medical Center, Chicago, IL
7. For the WHO Steering Committee, World Health Organization Classification of Neoplastic Diseases of the Hematopoietic, and Lymphoid Tissues