Affiliation: | a Department of Thoracic Surgery, Yamagata Prefectural Central Hospital, Yamagata, Japan b Department of Thoracic Surgery, Keio University School of Medicine, Tokyo, Japan c Department of Chest Surgery, Cancer Institute Hospital, Tokyo, Japan d Department of Cardiothoracic Surgery, University of Tokyo, Tokyo, Japan e Department of Thoracic Surgery, Chiba University, Chiba, Japan f Department of First Surgery, Tokyo Medical University, Tokyo, Japan g Department of General Thoracic Surgery, Tokyo Metropolitan Komagome Hospital, Tokyo, Japan h Department of Thoracic Surgery, Saitama Cancer Center, Saitama, Japan |