[1] Chinese Acad Med Sci, Peking Union Med Coll Hosp, Natl Clin Res Ctr Dermatol & Immunol Dis NCRC DID, Dept Rheumatol & Clin Immunol, Beijing, Peoples R China
[2] Joslin Diabet Ctr, Sect Islet Cell & Regenerat Biol, Boston, MA USA
[3] Harvard Med Sch, Dept Microbiol, Boston, MA USA
[4] Chinese Acad Med Sci, Beijing Hosp, Inst Geriatr Med, Natl Ctr Gerontol,Dept Rheumatol, Beijing, Peoples R China