Trends of β-Lactamase Occurrence Among<i>Escherichia coli</i>and<i>Klebsiella pneumoniae</i>in United States Hospitals During a 5-Year Period and Activity of Antimicrobial Agents Against Isolates Stratified by β-Lactamase TypeMariana Castanheira, Hélio S. Sader|Open Forum Infectious Diseases|2023Cited by 43