[1] Keio Univ, Sch Med, Div Pulm Med, Dept Med,Shinjuku Ku, Tokyo 1608582, Japan
[2] Keio Univ, Keio Pfizer Res Labs, Tokyo 1608582, Japan
[3] RNAi, Tokyo, Japan
[4] Hokkaido Univ, Dept Microbiol & Immunol, Grad Sch Med, Sapporo, Hokkaido 060, Japan
[5] Tohoku Univ, Sch Med, Dept Geriatr & Gerontol, Sendai, Miyagi 980, Japan