Ground Beef Recall Associated with Non-O157 Shiga Toxin–producing Escherichia coli, United States oleh Amy Robbins, Madhu Anand, David C. Nicholas, Jessica S. Egan, Kimberlee A. Musser, Steve Giguere, Hal Prince, Henrietta E. Beaufait, Stephen D. Sears, James Borda, Debbie Dietz, Thomas Collaro, Peter Evans, Scott A. Seys, Bonnie W. Kissler