1. Centers for Disease Control and Prevention, Atlanta, Georgia, USA;
2. Chicago Antimicrobial Resistance Project, Chicago, Illinois, USA;
3. Chicago Antimicrobial Resistance Project, Chicago, Illinois, USA;Cook County Hospital, Chicago, Illinois, USA;Rush Medical College, Chicago, Illinois, USA
4. Chicago Antimicrobial Resistance Project, Chicago, Illinois, USA;Cook County Hospital, Chicago, Illinois, USA;