Greetings. A pleasure to be able to communicate with you. I need 2 articles, but when I enter the DOI to be able to download it, it tells me that the DOI code does not appear or does nothing. The medical items I need are the following:
https://doi.org/10.1016/S0140-6736(22)02076-1
10.1016/S2213-1779%2823%2900460-2
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