See linked policy: Change in author affiliation
See guidance on how to enter multiple affiliations in Archie Help (Contact address and Affiliations); and how to add a footnote in RevMan:
- Open the review in RevMan
- Click on the Content Pane
- Review information
- Double-click on the authors in question and insert "These authors contributed equally to this work." in the Footnote field at the bottom of the author's contact details.