School of Pharmaceutical Guangzhou University of Chinese Medicine Guangzhou 510000 China;
Department of Pharmacological & Pharmaceutical Sciences College of Pharmacy University of Houston Houston TX 77204-5037 USA;
The First Affiliated Hospital Guangzhou University of Chinese Medicine Guangzhou Guangdong 510407 China;
Department of Stomatology The First Affiliated Hospital Jinan University Guangzhou 510630 China;