1. Department of Pathophysiology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China.
2. Key Laboratory of Tropical Disease Control (Sun Yat-Sen University), Ministry of Education, Guangzhou, People's Republic of China.
3. Key Laboratory of Gene Engineering of the Ministry of Education, School of Life Sciences, Sun Yat-Sen University, Guangzhou, People's Republic of China.