1. First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
2. Department of Cardiology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
3. Center for post-doctoral studies, Shandong University of Traditional Chinese Medicine, Jinan, China
4. School of Foreign Languages, Shandong University of Traditional Chinese Medicine, Jinan, China.