BRCA1 and nasopharyngeal carcinoma: As the expression levels of most previously reported BRCA1‐repressive miRNAs, except miR‐146a‐5p, were only slightly different (<4 folds) in NPC cell lines (Figure S5), the relatively high expression levels of total BART2‐3p, BART12, BART17‐5p and BART19‐3p in C17 cells may be heavily involved in modulating BRCA1 expression in the post‐transcriptional level.