Correction: Clostridium difficile Toxin B Causes Epithelial Cell Necrosis through an Autoprocessing-Independent Mechanism

• Nicole M. Chumbler, 
• Melissa A. Farrow, 
• Lynne A. Lapierre, 
• Jeffrey L. Franklin, 
• David B. Haslam, 
• James R. Goldenring, 
• D. Borden Lacy