1. Cardiology Second Ward, The First Hospital of Zibo, Zibo, Shandong 255200, P.R. China
2. Department of Pharmacy, The Fourth People's Hospital of Zibo, Zibo, Shandong 255200, P.R. China
3. Medical Record Management Section, The First Hospital of Zibo, Zibo, Shandong 255200, P.R. China