Comparison of ceftazidime-avibactam and ceftolozane-tazobactam in vitro activities when tested against gram-negative bacteria isolated from patients hospitalized with pneumonia in United States medical centers (2017-2018). by Sader HS, Flamm RK, Carvalhaes CG and Castanheira M. published in Diagn. Microbiol. Infect. Dis.: in press, 2019.