Prevalence in the United States of <i>aac(6</i> ′ <i>)</i> - <i>Ib</i> - <i>cr</i> Encoding a Ciprofloxacin-Modifying EnzymeChi Hye Park, David C. Hooper, George A. Jacoby et al.|Antimicrobial Agents and Chemotherapy|2006Cited by 749