PMID, DOI

[renatamuy]

I know this info is sourced from Clover but I think we could think about completing this column (or ReferenceText) in Virion (or Clover -> Virion) to facilitate referencing and checking the context of data collection. That there are many NAs in PMID that are not direct submissions and are linked to a PMID described as PUBMED (or at least are linked to some published text) when assessing NCBI manually. I think entrez::entrez_summary() can do that by retrieving existing PMIDs from sequence databases using the accession numbers. As alternative, it would be very nice to have a DOI column for the reference text making it easy to find the source papers and check info by clicking on a doi link.