1. Hematology Branch, NHLBI, Bethesda, MD, USA
2. Institute of Medical and Veterinary Sciences, Adelaide, Australia
3. Fred Hutchinson Cancer Research Center, Seattle, WA, USA
4. III. Med. Klinik Mannheim, University of Heidelberg, Mannheim, Germany
5. Novartis Pharmaceuticals, East Hanover, NJ, USA
6. Novartis Pharma AG, Basel, Switzerland
7. Hammersmith Hospital, London, United Kingdom