1. Biostatistics and Bioinformatics Staff, Office of Analytics and Outreach, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, Maryland, USA
2. Signals Team, Coordinated Outbreak Response and Evaluation Network, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, Maryland, USA
3. Division of Microbiology, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, Maryland, USA