参考资料：
https://www.fda.gov/drugs/drug-approvals-and-databases/fda-approves-nivolumab-resected-esophageal-or-gej-cancer
haoeyou.com/zhongliu_aizheng/weiai/20210526/6278.html
参考资料：
https://www.fda.gov/drugs/drug-approvals-and-databases/fda-approves-nivolumab-resected-esophageal-or-gej-cancer
haoeyou.com/zhongliu_aizheng/weiai/20210526/6278.html
