TREM2 and benign prostatic hyperplasia: Evaluation of proliferating cells by aligning myeloid cells to a cell cycle-related gene classifier indicates that, indeed, TREM2+ and MARCO+ macrophages (subclusters 0 and 5, respectively) are the two myeloid subclusters with the highest expression of cell cycle-related genes in BPH (Supplementary Figures S4C, D).