Impact of the number of resected lymph nodes during multi-portal VATS lobectomy for clinical N0 non-small cell lung cancer

Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea Contributions: (I) Conception and design: S Park, CH Kang; (II) Administrative support: All authors; (III) Provision of study materials or patients S Park, CH Kang; (IV) Collection and assembly of data: S Park, CH Kang; (V) Data analysis and interpretation: S Park, CH Kang; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors. Correspondence to: Chang Hyun Kang, MD, PhD. Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, 101 Daehak-ro, Jongro-gu, Seoul 03080, South Korea. Email: chkang@snu.ac.kr.