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. 2019 Jun 15;123(2):e385–e396. doi: 10.1016/j.bja.2019.05.026

Fig. 1.

Fig. 1

Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) flow diagram details the literature search. Of 452 potentially relevant studies, 17 studies investigated or referenced the efficacy of an analgesic therapy within 24 h of administration for trigeminal neuralgia. TN, trigeminal neuralgia.