The polymyxin‐B direct hemoperfusion OPTimal Initiation timing with Catecholamine PMX‐OPTIC study: A multicenter retrospective observational study. - Nakamura, Kensuke; Okazaki, Tetsuya; Tampo, Akihito; Mochizuki, Katsunori; Kanda, Naoki; Ono, Takahiro; Yanagita, Kunio; Shimomura, Taro; Murase, Taichi; Saito, Ken; Hirayama, Takahiro; Ito, Tomoaki; et al. (Artificial Organs, 2025)