Treatment patterns and prognostic factors of radiation-associated esophageal fistula in patients with esophageal squamous cell carcinoma: a retrospective cohort study

Hanyu Si, Qiuying An, Hongshan Ji, Yajing Wang, Yage Jia, Yuhao Su, Menglu Liu, Jin Yan, Zihan Zhang, Chanjun Zhen, Wenwen Bai, Rui Zhang, Liyuan Fu, Yuzhi Song, Ping Zhang, Zhiguo Zhou