Clinical outcomes of proximal gastrectomy versus total gastrectomy for locally advanced proximal gastric cancer: a propensity score matching analysis

National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China; Department of Microbiology and Immunology, Georgetown University Medical Center, Washington, DC, USA Contributions: (I) Conception and design: Y Chen, L Zhao; (II) Administrative support: D Zhao; (III) Provision of study materials or patients: F Ma, H Ren; (IV) Collection and assembly of data: R Ling, H Zhou, T Wang; (V) Data analysis and interpretation: S Hu, L Zhao; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors. These authors contributed equally to this work. Correspondence to: Yingtai Chen, MD, PhD; Shangying Hu, PhD; Dongbing Zhao, MD, PhD. National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 17 Panjiayuan Nanli, Beijing 100021, China. Email: yingtaichen@126.com; shangyinghu@cicams.ac.cn; dbzhao2003@sina.com.