1. Department of Cardiology, Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan 421002, P.R. China
2. Department of Pathology, First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, P.R. China
3. Department of Physiology, Institute of Neuroscience Research, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, P.R. China
4. Institute of Clinical Research, Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, P.R. China