The NIHR Journals Library follows the International Association of Scientific, Technical & Medical Publishers' (STM) guidelines regarding the Preservation of the Objective Record of Science:
"Articles that have been published should remain extant, exact and unaltered to the maximum extent possible"
(STM Guidelines on Preservation of the Objective Record of Science).
Therefore amendments will only be made to the published version of record in exceptional circumstances.
Corrections will be made if there is a serious error in the report or if the error impairs understanding of the report (corrections will not be made for minor errors such as spelling mistakes). The corrected report will replace the original and a correction notice will be published explaining the amendments that have been made.
We follow the COPE Guidelines for Retracting Articles.
https://doi.org/10.3310/policy/correction