1. Department of cardiovascular medicine, Qingdao Hospital of Traditional Chinese Medicine, Qingdao, Shandong, China
2. Cardiovascular disease department, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, Chinas
3. Digestive System Department, Chengyang District People’s Hospital, Qingdao, Shandong, China
4. Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, China
5. College of Life Science, Qi Lu Normal University, Jinan, Shandong, China
6. Medical Department, People’s Hospital of Chengyang, Qingdao, Shandong, China