https://pmc.ncbi.nlm.nih.gov/articles/PMC6687398/
(Description of cell type annotation. See fig. 1, which is explained in the beginning of Results section)
Stuart, T., Butler, A., Hoffman, P., Hafemeister, C., Papalexi, E., Mauck, W. M., Hao, Y., Stoeckius, M., Smibert, P., & Satija, R. (2019). Comprehensive integration of Single-Cell data. Cell, 177(7), 1888-1902.e21. https://doi.org/10.1016/j.cell.2019.05.031
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