1. Center for Genes, Environment and Health, National Jewish Health, Denver, Colorado, USA
2. Duke University School of Medicine, Durham, North Carolina, USA
3. Department of Microbiology, The University of Texas Health Science Center at Tyler, Tyler, Texas, USA
4. Department of Medicine, National Jewish Health, Denver, Colorado, USA
5. Division of Infectious Diseases, Duke University School of Medicine, Durham, North Carolina, USA
6. Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, North Carolina, USA