Correction: The Role of Selection in Shaping Diversity of Natural M. tuberculosis Populations

• Caitlin S. Pepperell, 
• Amanda M. Casto, 
• Andrew Kitchen, 
• Julie M. Granka, 
• Omar E. Cornejo, 
• Edward C. Holmes, 
• Bruce Birren, 
• James Galagan, 
• Marcus W. Feldman