Clinical Technology Project Fund from the Anhui Provincial Health Department09C152;Provincial Natural Science Research Project of Colleges and Universities of Anhui Province in 2013KJ2013Z155;Clinical Science Research Project of Anhui Medical University in 20152015xkj110;安徽省卫生厅临床技术项目基金09C152;安徽省2013年高校省级自然科学研究项目KJ2013Z155;安徽医科大学2015年度校临床科学研究项目2015xkj110