PDF files from this journal (see title) do not load from pubmed. Here is an example:
Note that these articles are free:
Thanks for reporting this.
I could reproduce the issue via PubMed, but when clicking "View PDF" on the SCience Direct website, I could access the paper: https://www.sciencedirect.com/science/article/pii/S2451993621000591?via%3Dihub
Can you please confirm if it's the same on your end?
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