[1] Okayama Univ, Sch Med, Dept Urol, Okayama 7008558, Japan
[2] Okayama Univ Hosp, Sect Infect Control, Okayama, Japan
[3] John D Dingell VA Med Ctr, Res & Med Serv, Detroit, MI USA
[4] Wayne State Univ, Sch Med, Div Infect Dis, Detroit, MI 48201 USA
[5] Univ Michigan, Sch Dent, Dept Biol & Mat Sci, Ann Arbor, MI 48109 USA
[6] Univ Michigan, Sch Med, Dept Immunol Microbiol, Ann Arbor, MI 48109 USA