You can export your study list from Covidence to RefWorks by exporting a .RIS file.
See the Covidence support page for specific instructions:
https://support.covidence.org/help/exporting-study-lists-to-your-reference-manager
You can import your articles from RefWorks to Covidence by importing a .RIS file.
See the Covidence support page for specific instructions:
https://support.covidence.org/help/study-imports
(Instructions for importing from PubMed to Covidence are also given)