1. Department of Anesthesiology/Critical Care Medicine; The Johns Hopkins Medical Institutions; Baltimore Maryland
2. Department of Medicine; The Johns Hopkins Medical Institutions; Baltimore Maryland
3. Department of Pathology (Transfusion Medicine); The Johns Hopkins Medical Institutions; Baltimore Maryland
4. Department of Anesthesiology; Peking Union Medical College Hospital; Beijing China
5. Department of Anesthesiology/Critical Care Medicine, Johns Hopkins Health System Blood Management Program; The Johns Hopkins Medical Institutions; Baltimore Maryland