 In a separate letter apologizing for the failure of peer review to address the issues with the article, PLOS One Editor-in-chief Joerg Heber said, "we have reached the conclusion that the study and resultant data reported in the article represent a valid contribution to the scientific literature.However, we have also determined that the study, including its goals, methodology, and conclusions, were not adequately framed in the published version, and that these needed to be corrected.