Feasibility of definitive chemoradiation therapy with nedaplatin and 5-fluorouracil in elderly patients with esophageal squamous cell carcinoma: A retrospective study oleh Akinori Watanabe, MD, Chikatoshi Katada, MD, PhD, Shouko Komori, MD, Hiromitsu Moriya, MD, PhD, Keishi Yamashita, MD, PhD, Hiroki Harada, MD, Mizutomo Azuma, MD, PhD, Yuki Kondo, MD, Yo Kubota, MD, Yasuaki Furue, MD, Natsuko Kawanishi, MD, Sakiko Yamane, MD, Takuya Wada, MD, Takafumi Yano, MD, Kenji Ishido, MD, PhD, Satoshi Tanabe, MD, PhD, Kazushige Hayakawa, MD, PhD, Wasaburo Koizumi, MD, PhD