1. Department of Radiology & Medical Imaging, University of Virginia, Charlottesville, Virginia, USA
2. Department of Radiology, Shengjing Hospital of China Medical University, Shenyang, China
3. Beijing Key Laboratory of Blood Safety and Supply Technologies, Beijing Institute of Transfusion Medicine, Beijing, China
4. Biochemistry & Molecular Genetics, University of Virginia, Charlottesville, Virginia, USA