1. The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu 730000, P.R. China
2. Cuiying Biomedical Research Center, The Second Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China
3. Department of Emergency, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China