Effect of pretreatment with low-dose Esketamine on the Propofol requirements and the onset time of cisatracurium during the induction of general anesthesia: a prospective, randomized, double-blinded trial. - An, Rui; Lin, Chunnan; Lu, Zeguang; Lin, Wenqian; Tan, Hongying; Zhang, Tianhua; Li, Huiting; Cao, Longhui (BMC Anesthesiology, 2025)