1. Department of Pharmacy, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
2. Clinical Lab, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
3. Department of Ultrasonography, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
4. Department of Anesthesiology, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China