Cell type annotation Cluster Analysis Cluster analysis Cluster separation Clustering Clustering algorithms Clustering results Consensus clustering Consensus method Cytology Differentially expressed gene Gene Expression Profiling Genes Leukocytes, Mononuclear Partition cells Population statistics RNA ScRNA-seq Sequence Analysis, RNA Single-Cell Analysis Sub-populations Supervised methods Unsupervised clustering article cluster analysis gene expression gene expression profiling mononuclear cell peripheral blood mononuclear cell sequence analysis