1. Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, Guangxi 530021, P.R. China
2. Department of Physiology, School of Preclinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P.R. China
3. Department of Physiology, Yong Loo Lim School of Medicine, National University of Singapore, Singapore 117543, Republic of Singapore