Update dataset-the-cancer-genome-atlas.md

Author: mamtagiri

articles/open-datasets/dataset-the-cancer-genome-atlas.md

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 # TCGA Open Data
 
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 The Cancer Genome Atlas (TCGA), a landmark cancer genomics program, molecularly characterized over 20,000 primary cancer and matched normal samples spanning 33 cancer types[[1]](https://www.cancer.gov/about-nci/organization/ccg/research/structural-genomics/tcga). The TCGA cancer data made available publically are two tiers: open or controlled access. 
 
 - Open access [available on Azure]: This dataset contains deindentified clinical and biospecimen data or summarized data that doesn't contain any individually identifiable information. The data types included are Gene expression, methylation beta values and protein quantification. DNA level datatype includes gene level copy number and masked copy number segment.
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 East US 2: 'https://datasettcga.blob.core.windows.net/dataset'
 
-[SAS Token](/azure/storage/common/storage-sas-overview): ?sp=rl&st=2022-10-07T19:43:37Z&se=2030-10-02T03:43:37Z&spr=https&sv=2021-06-08&sr=c&sig=9YgXjisOpHJNgdeMb5lOOzBhA38PWGM8g2DHjo9A5Cs%3D
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 ## Use terms
 
 Data is available without restrictions. For more information and citation details, see the [TCGA Program page](https://www.cancer.gov/about-nci/organization/ccg/research/structural-genomics/tcga/using-tcga/citing-tcga)