Fig. 5From: The effect and safety of monoclonal antibodies to calcitonin gene-related peptide and its receptor on migraine: a systematic review and meta-analysisFunnel plot of the meta-analysis showed no significant publication bias in the reduction of monthly migraine days. a weeks 1–4; b weeks 5–8; c weeks 9–12. SE = Standard error, SMD = Standardized mean differenceBack to article page