This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Media types misreported in PubMed Central by DOI prefix May . en The plot shows for articles indexed in PubMed Central in May which media types have been reported correctly issuecomment GitHub Open Access Media Importer issue webcitation org CC Nils Dagsson Moskopp cczero Uploaded with Open Access Media Importer