A multicenter, randomized, parallel-group confirmatory study protocol to evaluate the efficacy of Soft Protector CPC, a novel oral mucosal protectant, in preventing oral mucositis and alleviating pain in patients with breast cancer. - Omori, Kazuhiro; Furukawa, Kohei; Usubuchi, Masatoshi; Hamada, Tomofumi; Shien, Tadahiko; Yoshida, Michihiro; Nakatsuka, Yuki; Hotta, Katsuyuki; Ibaragi, Soichiro; Takashiba, Shogo (PLoS ONE, 2026)