Risk factors for polymicrobial klebsiella pneumoniae bloodstream infection: a retrospective cohort study using the antimicrobial resistance monitoring database - Huian Ge; Jianhao Su; Gaoxiang Xu; Yanan Li; Zhikang Xiao; Jiaqing Yan; Yigeng Peng; Jianzhong Xu; Chen Qiu; Ri Liu (European Journal of Clinical Microbiology & Infectious Diseases, 2026)