1. NSF International, Applied Research Center, Ann Arbor, Michigan, USA
2. Division of Microbiology, Office of Regulatory Science, Center for Food Safety and Nutrition, U.S. Food and Drug Administration, College Park, Maryland, USA
3. Coordinated Outbreak Response and Evaluation (CORE) Network, Center for Food Safety and Nutrition, U.S. Food and Drug Administration, College Park, Maryland, USA
4. Division of Produce Safety, Office of Food Safety, Center for Food Safety and Nutrition, U.S. Food and Drug Administration, College Park, Maryland, USA