Department of Cancer Medicine (Thoracic), Zhejiang Cancer Hospital, Key Laboratory Diagnosis and Treatment Technology on Thoracic Oncology (Esophagus, Lung), Hangzhou 310022, China
Contributions: (I) Conception and design: W Mao; (II) Administrative support: Y Fan; (III) Provision of study materials or patients: Y Fan; (IV) Collection and assembly of data: Y Fan; (V) Data analysis and interpretation: All authors; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors.
Correspondence to: Yun Fan. Department of Cancer Medicine (Thoracic), Zhejiang Cancer Hospital, Key Laboratory Diagnosis and Treatment Technology on Thoracic Oncology (Esophagus, Lung), 38#Guangji Road, Banshanqiao, Hangzhou 310022, China. Email: fanyun@zjcc.org.cn.