Dr. Yuwen Zhang should be included in the author byline. Dr. Zhang should be listed as the second author and is affiliated with #1–5: 1 Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America; 2 Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America; 3 Children's Research Institute, Milwaukee, Wisconsin, United States of America; 4 Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America; 5 Department of Microbiology and Immunology, University of Louisville, Louisville, KY 40202. The contributions of this author are as follow: Performed the experiments and analyzed the data.The correct citation is: Korrer MJ, Zhang Y, Routes JM (2014) Possible Role of Arginase-1 in Concomitant Tumor Immunity. PLoS ONE 9(3): e91370. doi:10.1371/journal.pone.0091370