Fig. 1From: Conducting proportional meta-analysis in different types of systematic reviews: a guide for synthesisers of evidenceExample prevalence proportional meta-analysis investigating overall prevalence of cervical infection by HPV-18 in Brazil. Created in R, package meta. Reproduced under Creative Commons from: Colpani, V et al. “Prevalence of human papillomavirus (HPV) in Brazil: A systematic review and meta-analysis”. PloS one 15.2 (2020): e0229154 [20]Back to article page