[1] Natl Ctr Global Hlth & Med, Dept Resp Med, Shinjuku Ku, Tokyo 1628655, Japan
[2] Kumamoto Reg Med Ctr, Div Resp Dis, 5-16-10 Honjo, Kumamoto 8600811, Japan
[3] Natl Ctr Global Hlth & Med, AIDS Clin Ctr, Shinjuku Ku, Tokyo 1628655, Japan
[4] Natl Ctr Global Hlth & Med, Dept Pathol, Shinjuku Ku, Tokyo 1628655, Japan