To better assess LINC00355 cell type-specific expression and show expression levels are not due to contamination of using bulk patient tissue from RNA-Seq, we also assessed its expression in single-cell RNA-Seq data from breast tissues downloaded from Wu et al.44 We detected very low, 0.90% or less, of cells expressing LINC00355, which was restricted to cancer epithelial cells (Supp. The gene discussed is LINC00355; the disease is cancer.