1. Pathology Department, Xingtai Medical College, Xingtai, Hebei 054000, P.R. China
2. Department of Internal Medicine, Civil Administration General Hospital of Hebei, Xingtai, Hebei 054000, P.R. China
3. Department of Internal Medicine, Xingtai Medical College, The Third Affiliated Hospital of Xingtai Medical College, Xingtai, Hebei 054000, P.R. China
4. Department of Internal Medicine, The Third Affiliated Hospital of Xingtai Medical College, Xingtai, Hebei 054000, P.R. China