1. Department of Clinical Laboratory, Tangshan Maternal and Children Hospital, Tangshan, Hebei 063000, P.R. China
2. College of Integrative Chinese and Western Medicine, Hebei Medical University, Shijiazhuang, Hebei 050017, P.R. China
3. Department of Endocrinology, The Third Affiliated Hospital of Hebei Medical University, Shijiazhuang, Hebei 050017, P.R. China
4. Department of Chinese Medicine, Tangshan Maternal and Children Hospital, Tangshan, Hebei 063000, P.R. China
5. Department of Blood Transfusion, Hebei Provincial People's Hospital, Shijiazhuang, Hebei 050017, P.R. China
6. Department of Biochemistry and Molecular Biology, The Key Laboratory of Neurobiology and Vascular Biology, Hebei Medical University, Shijiazhuang, Hebei 050017, P.R. China