1. Pathology and Laboratory Medicine, London Health Sciences Center; London Ontario, N6A 5W9 Canada
2. Clinical Research, Beckman Coulter, Inc.; Miami 33196 Florida
3. Calgary Laboratory Services; Calgary T2N 2T9 Alberta Canada
4. MLL Munich Leukemia Laboratory; Munich 81377 Bavaria Germany
5. The Ohio State University; Columbus 43210 Ohio
6. Department of Medicine; Schulich School of Medicine Western University of Ontario; London N6K 5W9 Ontario Canada