1. Guangzhou University of Chinese Medicine, Guangzhou 510405, China
2. The First Affiliated Hospital of Shantou University Medical College, Shantou 515041, China
3. Macalester College, Saint Paul, MN 55105, USA
4. The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, China
5. Guangdong Clinical Research Academy of Chinese Medicine, Guangzhou 510405, China