作者单位:Third Mil Med Univ, Inst Canc, Xinqiao Hosp, 2 Xinqiao St, Chongqing 400037, Peoples R China[1]Third Mil Med Univ, Dept Pathogen Biol, Chongqing, Peoples R China[2]Duke Univ, Dept Immunol, Med Ctr, Durham, NC USA[3]Third Mil Med Univ, Dept Immunol, Chongqing, Peoples R China[4]