The authors own the copyright of the published articles and can deposit a copy of the final published PDF article in their institutional repository or any suitable forum. But we recommend that the authors provide a link from the deposited version to the URL of the published article on the journal's website; in all cases. This would help in protecting the integrity and authenticity of the scientific record, as the online published version on the journal’s website is the definitive version of the article.
Authors are also advised to check the archiving requirements of the funding agency (if the study was funded) to ensure compliance with the archiving policy of the respective funding agency.