Correction: Collagen Sequence Analysis of the Extinct Giant Ground Sloths Lestodon and Megatherium

• Michael Buckley, 
• Richard A. Fariña, 
• Craig Lawless, 
• P. Sebastián Tambusso, 
• Luciano Varela, 
• Alfredo A. Carlini, 
• Jaime E. Powell, 
• Jorge G. Martinez