If there is scientific misconduct or alleged fraud in a published article, the editorial department will investigate it and send an email to the authors. The authors have an opportunity to address the issue. If only some errors do not severely affect any findings of the article,corrigendum will appear to correct these errors.The corrigendum will appear as a new article in the journal and cite the original published article. In some severe cases like data fabrication or severe plagiarism, the editorial department will retract the article and publish a retraction notice.