1. Division of Transfusion Medicine, Department of Pathology Johns Hopkins University School of Medicine Baltimore Maryland USA
2. Departments of Internal Medicine and Pediatrics Simmons Cancer Institute at SIU School of Medicine Springfield Illinois USA
3. Kaiser Permanente Northern California Division of Research Oakland California USA
4. Vitalant Research Institute San Francisco California USA
5. Department of Anesthesiology and Critical Care Medicine Johns Hopkins University School of Medicine Baltimore Maryland USA