Update README.md

README.md

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 # pubmed-bert-squad-covidqa
 
-This model is a fine-tuned version of [Sarmila/pubmed-bert-squad-covidqa](https://huggingface.co/Sarmila/pubmed-bert-squad-covidqa) on the squad qa first, covid_qa_deepset dataset.
+This model is a fine-tuned version of [microsoft/BiomedNLP-PubMedBERT-base-uncased-abstract-fulltext](https://huggingface.co/microsoft/BiomedNLP-PubMedBERT-base-uncased-abstract-fulltext) on the squad qa first, covid_qa_deepset dataset.
 It achieves the following results on the evaluation set for squad:
 {'exact_match': 59.0, 'f1': 76.32473929579194}