[1] Thammasat Univ, Div Infect Dis, Fac Med, Khlong Nueng, Prathum Thani, Thailand
[2] Mahidol Univ, Siriraj Hosp, Div Diagnost Radiol, Dept Radiol,Fac Med, Bangkok, Thailand
[3] Manorom Hosp, Bangkok, Thailand
[4] Bumrungrad Hosp, Bangkok, Thailand
[5] Rutnin Hosp, Dept Opthalmol, Bangkok, Thailand
[6] Univ N Carolina, Div Infect Dis, Chapel Hill, NC 27515 USA