LI Bin-bin~1,ZHONG Fu-guang~2,YI Hong-sheng~2,WANG Xian-ran~3,LI Liang-fang~4,WANG Li-lan~5,WU Li-fu~2(1.Department of Pathophysiology,Guangdong Medical College,Dongguan 523808,China,2.Institute of Medicine Science,Guiyang Medical College,Guiyang 550004,3.The Peoples Hospital of Tianzhu County,Tianzhu 556700,4.The Peoples Hospital of Hezhang County,Hezhang 553200,5.The Peoples Hospital of Wuchuan County,Wuchuan 564300,China)