BRCA1 and nasopharyngeal carcinoma: Despite the BRCA1 mRNA level in NPC tumours (n = 55) being significantly higher than in non‐cancerous NP tissues (n = 21; P = 0.0189) in the qRT‐PCR analysis (Figure 1C), reduction of BRCA1 protein expression in NPCs was found in an independent cohort of 30 normal NPs and 41 NPCs (P = 0.0005) (Table S5).