[1] China Med Univ, Sch Med, Dept Microbiol, Taichung, Taiwan
[2] Natl Cheng Kung Univ, Coll Med, Dept Microbiol & Immunol, Tainan 70101, Taiwan
[3] Natl Cheng Kung Univ, Coll Med, Dept Biochem & Mol Biol, Tainan 70101, Taiwan
[4] Natl Cheng Kung Univ, Coll Med, Dept Pathol, Tainan 70101, Taiwan