1. 1Center for Food Safety and Department of Food Science and Technology, University of Georgia, 1109 Experiment Street, Griffin, Georgia 30223-1797
2. 2Department of Food Science and Technology, University of California, One Shields Avenue, Davis, California 95616-8598
3. 3The Procter and Gamble Company, Sharon Woods Technical Center, 11530 Reed Hartman Highway, Cincinnati, Ohio 45241
4. 4The Procter and Gamble Company, 8700 Mason-Montgomery Road, Mason, Ohio 45040, USA