1. Department of Cardiology, First Affiliated Hospital, Guangxi University of Chinese Medicine, Nanning, Guangxi Zhuang Autonomous Region 530023, P.R. China
2. College of Professional and Continuing Education, The Hong Kong Polytechnic University, Hong Kong 999077, SAR, P.R. China
3. School of Nursing, Guangxi University of Chinese Medicine, Nanning, Guangxi Zhuang Autonomous Region 530200, P.R. China
4. Department of Pharmacology, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, P.R. China