1 Japanese Association for Chest Surgery, 3F Chiyoda Seimei Kyoto Oike Building 200 Takamiya-cho, Takakura-Oike-dori, Nakagyo-ku, 604-0835, Kyoto, Japan. tcvshun@jichi.ac.jp.
2 Department of Thoracic Surgery, Jichi Medical University, Tochigi, Japan. tcvshun@jichi.ac.jp.
3 Japanese Association for Chest Surgery, 3F Chiyoda Seimei Kyoto Oike Building 200 Takamiya-cho, Takakura-Oike-dori, Nakagyo-ku, 604-0835, Kyoto, Japan.
4 Department of Thoracic Surgery, Tokyo Medical University Hospital, Tokyo, Japan.
5 Department of Thoracic Surgery, Tohoku Medical and Pharmaceutical University Hospital, Miyagi, Japan.
6 Department of Thoracic Surgery, University of Tokyo Graduate School of Medicine, Tokyo, Japan.
7 Department of General Thoracic Surgery, Kyorin University Hospital, Tokyo, Japan.
8 Department of General Thoracic Surgery, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.
9 Department of Thoracic Surgery, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan.
10 Department of Thoracic Surgery, Institute of Development, Aging and Cancer, Tohoku University, Miyagi, Japan.
11 Faculty of Medicine, Department of Thoracic Surgery, University of Tsukuba, Ibaraki, Japan.
12 Department of General Thoracic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan.
13 Department of Surgical Oncology, Hiroshima University, Hiroshima, Japan.
14 Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan.
15 Department of General Thoracic Surgery, Dokkyo Medical University, Tochigi, Japan.
16 Department of Healthcare Quality Assessment, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8655, Tokyo, Japan.