1. Center for Anti-Infective Research and Development, Hartford Hospital, Hartford, Connecticut, USA
2. Department of Clinical Microbiology and Infectious Diseases, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Clinical Microbiology Laboratory, Charlotte Maxeke Johannesburg Academic Hospital, National Health Laboratory Service, Johannesburg, South Africa
3. Division of Infectious Diseases, Hartford Hospital, Hartford, Connecticut, USA