1. Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD;
2. Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, People’s Republic of China;
3. Center for Human Immunology, Autoimmunity and Inflammation, National Institutes of Health, Bethesda, MD; and
4. Systems Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD