1. Institute of Cell Biotechnology; China and Russia Medical Research Center; Harbin China
2. Center for Endemic Disease Control; Chinese Center for Disease Control and Prevention; Harbin China
3. Key Laboratory of Etiology and Epidemiology; National Health and Family Planning Commission of the People's Republic of China; Harbin China
4. Harbin Medical University; Harbin China
5. Departments of Surgery; University of Illinois College of Medicine; Peoria Illinois. Institute of Laboratory Animal Sciences; Chinese Academy of Medical Sciences & Peking Union Medical College; Beijing China