Table 1.

Key terms utilized in the search strategy.

1	“Nasopharyngeal cancinoma” [Topic] AND “miRNA” [Topic]
2	“NPC” [Topic] AND “Chemoresistance” [Topic]
3	“Prognosis” [Topic] AND “Chemo resistance” [Topic]
4	“miRNA” [Topic] AND “Biomarkers” [Topic]
5	“miRNA” [Topic] AND “NPC” [Topic] AND “Prognosis” [Topic]
6	“Prognosis” [Topic] OR “Survival outcome in NPC” [Topic]
7	“Upregulation” [Topic] OR “Downregulation in NPC” [Topic]
8	“Follow up studies.” [Topic] OR “miRNA” [Topic]
9	“Systematic review” [Topic]“Meta-analysis study” [Topic] AND “NPC” [Topic]