Shengtan Zhang1, Xinyu Lan1, Jishan Lan2. 1. Department of Pharmacy, Cangzhou Hospital of Integrated Traditional and Western Medicine of Hebei Province, Cangzhou, 061001, Hebei Province, People's Republic of China. 2. Department of Anesthesiology, Cangzhou Hospital of Integrated Traditional and Western Medicine of Hebei Province, Cangzhou, 061001, Hebei Province, People's Republic of China. eyymzk@126.com.