Tumor Burden Monitoring with Circulating Tumor DNA During Treatment in Patients with Esophageal Squamous Cell Carcinoma

Yosuke Morimoto, Satoru Matsuda, Hirofumi Kawakubo, Kohei Nakamura, Ryota Kobayashi, Kazuhiko Hisaoka, Jun Okui, Masashi Takeuchi, Eriko Aimono, Kazumasa Fukuda, Rieko Nakamura, Hideyuki Saya, Hiroshi Nishihara, Yuko Kitagawa