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APA Citation
Saccone, G., & Berghella, V. (n.d.). folic acid supplementation in pregnancy to prevent preterm birth: a systematic review and meta-analysis of randomized controlled trials. European journal of obstetrics, gynecology, and reproductive biology, 199, 76–81. http://access.bl.uk/ark:/81055/vdc_100031196874.0x000035