Scholarly record
Material post-publication errors or integrity concerns are handled transparently rather than silently changing the record.
Corrections
A correction may be issued when an error materially affects the article or publication record without invalidating the work as a whole.
Expressions of concern / retractions
Serious unresolved concerns may warrant an expression of concern. Retraction may be considered when findings are unreliable, publication is redundant, research is unethical, or serious error/misconduct undermines the article. Notices should link to the affected record.