348PInterim analysis of prospective observational study on the efficacy of nivolumab for Japanese advanced melanoma patients (CREATIVE study). (25th November 2018) - Nakamura, Y; Takahashi, A; Namikawa, K; Takenouchi, T; Kitano, S; Fujita, T; Kubota, K; Yamanaka, T; Kawakami, Y; Yamazaki, N