1. Department of Cardiology, The First Hospital of Hebei Medical University, Shijiazhuang, Hebei 050031, P.R. China
2. Department of Biochemistry and Molecular Biology, Hebei Medical University, Shijiazhuang, Hebei 050017, P.R. China
3. Department of Oncology, The First Hospital of Hebei Medical University, Shijiazhuang, Hebei 050031, P.R. China