Update README.md

README.md

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 ## Paper and Resources
 
 For details on Med-CXRGen-F, including its architecture, training strategy, and evaluation—please refer to the following resources:
-- 📘 **Paper:** [Gla-AI4BioMed at RRG24: Visual Instruction-tuned Adaptation for Radiology Report Generation](https://aclanthology.org/2024.bionlp-1.54/)
+- 📘 **Paper:** [Gla-AI4BioMed at RRG24: Visual Instruction-tuned Adaptation for Radiology Report Generation](https://arxiv.org/abs/2412.04954)
 - 💻 Code Repository: [GitHub: Med-CXRGen](https://github.com/X-iZhang/RRG-BioNLP-ACL2024)
 
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