国家自然科学基金81272698;国家卫生行业科研专项201302016;全军医学科技"十二五"科研重点项目BWS12J049;国家高技术研究发展计划863计划2012AA02A504Fund program: National Nature Science Foundation of China81272698;Special Scientific Research Foundation of Health Sector from the National Health and Family Planning Commission of China201302016;PLA Medical Technology key project of scientific research in 12th Five-Year-PlanBWS12J049;National High Technology Research and Development Program of China2012AA02A504