1. From the Institute of Pathology, University of Berne, Oxford
2. From the Nuffield Department of Pathology, John Radclijfe Hospital, Oxford
3. From the Central Hematology Laboratory, University of Berne, Berne
4. From the Institute of Clinical and Experimental Research, Tiefenauspital, University of Berne, Berne
5. From the Nuffield Department of Clinical Medicine, Oxford
6. From the Department of Hematology, John Radclijfe Hospital Oxford
7. From the Institute of Medical Oncology, University of Berne, Berne, Switzerland.