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APA Citation
Saccone, G., Ciardulli, A., Xodo, S., Dugoff, L., Ludmir, J., D'Antonio, F., Boito, S., Olearo, E., Votino, C., Maruotti, G. M., Rizzo, G., Martinelli, P., & Berghella, V. (2017). cervical pessary for preventing preterm birth in twin pregnancies with short cervical length: a systematic review and meta-analysis. Journal of maternal-fetal & neonatal medicine, 30, 2918–2925. http://access.bl.uk/ark:/81055/vdc_100049922160.0x000043