Effect of acute kidney injury and overall survival in patients with postoperative head and neck cancer who received chemoradiotherapy with cisplatin: A supplementary analysis of th... oleh Yoshinori Imamura, Naomi Kiyota, Makoto Tahara, Takeshi Kodaira, Ryuichi Hayashi, Hiroshi Nishino, Yukinori Asada, Hiroki Mitani, Shigemichi Iwae, Naoki Nishio, Yusuke Onozawa, Nobuhiro Hanai, Akira Ohkoshi, Hiroki Hara, Nobuya Monden, Masato Nagaoka, Shujiro Minami, Ryo Kitabayashi, Keita Sasaki, Akihiro Homma, the Head and Neck Cancer Study Group of the Japan Clinical Oncology Group (JCOG‐HNCSG)