1. 1Department of Nutrition and Food Science, University of Maryland, College Park, Maryland 20742, USA
2. 2Kirkegaard and Perry Laboratories, Gaithersburg, Maryland 20879, USA
3. 3The Center for Food Safety and Quality Enhancement, Department of Food Science and Technology, University of Georgia, Griffin, Georgia 30223, USA
4. 4Department of Microbiology, University of Maryland, College Park, Maryland 20742, USA