1. Department of Respiratory Medicine Tokyo Medical and Dental University Tokyo Japan
2. Department of Respiratory Medicine Hiratsuka Kyosai Hospital Kanagawa Japan
3. Department of Respiratory Medicine Yamanashi Prefectural Central Hospital Yamanashi Japan
4. Department of Respiratory Medicine JA Toride General Medical Center Ibaraki Japan
5. Department of Pulmonology Ome Municipal General Hospital Tokyo Japan
6. Department of Respiratory Medicine Tsuchiura Kyodo General Hospital Ibaraki Japan
7. Department of Pulmonology Tokyo Kyosai Hospital Tokyo Japan