 et al (2017). The data are unique
  molecular identifier (UMI) counts for 16,791 genes in 3,774
  cells. (Genes with no expression in any of the cells were removed.)
  Since the majority of the UMI counts are zero, they are efficiently
  stored as a 3,774 x 16,791 sparse matrix. These data are used in
  the vignette illustrating how fastTopics can be used to analyze to
  single-cell RNA-seq data." />




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