314PAssociation of immune-related adverse events and efficacy in Japanese patients with squamous cell carcinoma of the head and neck treated with nivolumab. (25th November 2018) - Otsuka, T; Fujiishi, K; Matsumoto, K; Kimura, T; Koike, R; Cho, H; Hasegawa, A; Nishio, M; Otozai, S; Yoshii, T; Kudo, T; Fujisawa, F; et al.