Zilong Zhao1, Jianning Zhang1, Jing-Fei Dong2,3. 1. Department of Neurosurgery, Tianjin Institute of Neurology, Tianjin Medical University General Hospital, Tianjin, China. 2. BloodWorks Research Institute, Seattle, WA, USA. 3. Division of Hematology, Department of Medicine, University of Washington, School of Medicine, Seattle, WA, USA.