1. Chengde Medical College, Chengde, Hebei Province, China
2. Emergency Department, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
3. Guiyang Medical College, Guiyang, Guizhou Province, China
4. Department of Clinical Laboraotory, First Central Hospital of Baoding, Baoding, Hebei Province, China
5. Hemorheology Center, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China