Find_6 'is bibliographic metadata available?' relates closely to Find_2 and as a result mirrors our findings of whether there is a link to the original manuscript, which includes author affiliation and bibliographic data. Access_6, 'Do metadata describe data cleaning, analysis, processing and visualisation?'. Although some of the necessary information was given in 22 SI PDFs reporting primary data, it is difficult to extract and not linked directly to the data. The metadata were not found within the native data files, and therefore if the primary data were separated from the original manuscript or accompanying SI file that context would be lost. An exception is the one article that had primary data along with code deposited in GitHub, where the Jupyter Notebook file 42 provides the code used to process the data and therefore documents the operations.