[1] Tokyo Med & Dent Univ, Tokyo, Japan
[2] Niigata Univ, Niigata, Japan
[3] Chiba Univ, Chiba, Japan
[4] Kurashiki Municipal Hosp, Kurashiki, Okayama, Japan
[5] Nagasaki Univ, Nagasaki, Japan
[6] Aichi Med Univ, Nagakute, Aichi, Japan
[7] Kyorin Univ, Tokyo, Japan
[8] Natl Ctr Global Hlth & Med, Tokyo, Japan
[9] Kobe City Med Ctr Gen Hosp, Kobe, Hyogo, Japan
[10] Hokkaido Univ, Sapporo, Hokkaido, Japan
[11] Tohoku Univ, Sendai, Miyagi, Japan
[12] Kyoto Univ, Kyoto, Japan
[13] NHO Kinki Chuo Chest Med Ctr, Osaka, Japan