1. The First Clinical Medical College of Lanzhou University, The First Affiliated Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China
2. Department of Special Medicine, The First Affiliated Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China
3. Central Laboratory, The First Affiliated Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China