Qianyun Liu1, Bin Qi2, Li Zhang3, Mei Zhang4, Li Xiao5. 1. Department of Cardiology, Zaozhuang Municipal Hospital, Zaozhuang, China. 2. Department of Pediatrics, Zaozhuang Hospital of Traditional Chinese Medicine, Zaozhuang, China. 3. Department of Pediatrics Obstetrics and Gynecology, Zaozhuang Hospital of Traditional Chinese Medicine, Zaozhuang, China. 4. Department of Cardiovascular, Zaozhuang Hospital of Traditional Chinese Medicine, Zaozhuang, China. 5. Department of Medical Records, Zaozhuang Municipal Hospital, Zaozhuang, China - liuqianyun@163.com.