Lishan Wang requested the retraction of this article.

Upon review of the submission history for the manuscript, the PLOS ONE Editors found indications that the peer review process was compromised by the submission of reviews through fabricated reviewer accounts. An institutional investigation, conducted by the Administration Office of Bio-X Institutes at Shanghai Jiao Tong University, supported the concerns about the integrity of the review process and indicated that Lishan Wang was solely responsible for the article, contrary to information provided to the journal at time of submission.

In light of the above concerns, the PLOS ONE Editors retracted the research article [1] on July 26, 2016.

This retraction notice and the linked article [1] and Correction [2] were republished on June 7, 2022 to amend content, references, and metadata.