Just a clarification – PubMed and PubMed Central are not the same thing. PubMed is a database of abstracts and author information that nearly every biology/medical paper gets recorded in upon publication, whether the paper is freely available or not. PubMed Central is the database of freely available papers with full text. It’s depositing the paper in PubMed Central that’s the issue, not just being in PubMed.
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