Effectiveness and safety of low-dose intraoperative tranexamic acid in cardiac surgery: a retrospective before-and-after study. - Chung, Jaeyeon; Kim, In Jung; Ju, Jae-Woo; Hong, Chan-ho; Cho, Youn Joung; Jeon, Yunseok; Nam, Karam (BMC Anesthesiology, 2025)