Hello Alexei,
Thank you for your kind words, we’re glad to hear cBioPortal has been useful in your research.
Unfortunately you cannot query for expression in combined studies of multiple datasets, that feature is not supported. Because the Z-scores for each gene are normalized within their own studies, cross-study comparisons are not supported for this data type.
More information for how we process expression data is available in our FAQ and on our Github page.
Best,
David M. Higgins, Ph.D. | (he/him)
Informatics Program Manager
Center for Data-Driven Discovery in Biomedicine (D3b)
Children’s Hospital of Philadelphia, USA
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