Time-Dependent Structural Alteration of Rituximab Analyzed by LC/TOF-MS after a Systemic Administration to Rats. oleh Yuki Otani, Atushi Yonezawa, Masahiro Tsuda, Satoshi Imai, Yasuaki Ikemi, Shunsaku Nakagawa, Tomohiro Omura, Takayuki Nakagawa, Ikuko Yano, Kazuo Matsubara