1. Department of Respiratory Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
2. Department of Respiratory Medicine, Musashino Red Cross Hospital, 1-26-1 Kyonancho, Musashino-shi, Tokyo 180-8610, Japan
3. Department of Respiratory Medicine, Tokyo Metropolitan Bokutoh Hospital, 4-23-15 Koutoubashi, Sumida-ku, Tokyo 130-8575, Japan
4. Department of Respiratory Medicine, Yamanashi Prefectural Central Hospital, 1-1-1 Fujimi, Kofu-shi, Yamanashi 400-8506, Japan
5. Department of Respiratory Medicine, Yokosuka Kyosai Hospital, 1-16 Yonegahama-dori, Yokosuka-shi, Kanagawa 238-8558, Japan
6. Department of Respiratory Medicine, Yokohama Municipal Minato Red Cross Hospital, 3-12-1 Shinyamashita, Naka-ku, Yokohama-shi, Kanagawa 231-8682, Japan
7. Department of Respiratory Medicine, Kudanzaka Hospital, 1-6-12 Kudanminami, Chiyoda-ku, Tokyo 102-0074, Japan
8. Department of Respiratory Medicine, Ome Municipal General Hospital, 4-16-5 Higashi-ome, Ome-shi, Tokyo 198-0042, Japan
9. Department of Respiratory Medicine, Kashiwa Municipal Hospital, 1-3 Fuse, Kashiwa-shi, Chiba 277-0825, Japan
10. Department of Respiratory Medicine, Tsuchiura Kyodo General Hospital, 4-1-1 Otsuno, Tsuchiura-shi, Ibaraki 300-0028, Japan
11. Department of Respiratory Medicine, Tokyo Metropolitan Ohtsuka Hospital, 2-8-1 Minami-ohtsuka, Toshima-ku, Tokyo 170-8476, Japan
12. Department of Respiratory Medicine, Hokushin General Hospital, 1-5-63 Nishi, Nakano-shi, Nagano 383-8505, Japan
13. Department of Respiratory Medicine, Tokyo Kyosai Hospital, 2-3-8 Nakameguro, Meguro-ku, Tokyo 153-8934, Japan
14. Department of Biostatistics, M&D Data Science Center, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan