Update README.md

README.md

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-license: apache-2.0
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+---
+license: apache-2.0
+---
+Dataset for CVPR 2024 paper, [**"VoCo: A Simple-yet-Effective Volume Contrastive Learning Framework for 3D Medical Image Analysis"**](https://arxiv.org/abs/2402.17300)
+
+Authors: Linshan Wu, <a href="https://scholar.google.com/citations?user=PfM5gucAAAAJ&hl=en">Jiaxin Zhuang</a>, and <a href="https://scholar.google.com/citations?hl=en&user=Z_t5DjwAAAAJ">Hao Chen</a>
+
+**NOTE THAT** we are not the authors of these datasets. Although all these datasets are publicly available for academic research, you need to cite the original works as shown in our paper. 
+For certain datasets that necessitate approval from the authors, you need to download it from the original link.
+
+## Download Dataset
+```
+cd VoCo
+mkdir data
+huggingface-cli download Luffy503/PreCT-160K  --repo-type dataset --local-dir .  --cache-dir ./cache
+```