1 Microbial Genomic Epidemiology Laboratory, Infectious Diseases Epidemiology Research Unit, Graduate School of Public Health and School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA.
2 Microbial Genomic Epidemiology Laboratory, Infectious Diseases Epidemiology Research Unit, Graduate School of Public Health and School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA. Electronic address: lharriso@edc.pitt.edu.