国家重点基础研究发展项目973计划2005CB5225007;卫生部临床学科重点项目2010-2012;"十一五"国家科技支撑计划2006BAI05A07;This study was supported by National Key Basic Research and Development Project973 ProjectGrant 2005CB5225007;Key Project for Clinical Discipline of Ministry of Health between 2010 and 2012;National Science and Technology Support Program of"11th Five-Year Plan"Grant 2006BA I05A07