国家自然科学基金(30470642,30670780),山东省科技攻关项目 (2008GG10002006),山东省卫生厅项目(2007HZ026)和青岛市科技局项目(05-1-JC-93).
Supported by National Natural Science Foundation of China (30470642,30670780),Shandong Provincial Program for Tackle Key Problems in Science and Technology(2008GG10002006),Program of Shandong Provincial Health Department(2007HZ026),and Program of Qingdao Municipal Science and Technology Commission(05-1-JC-93)