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APA Citation
Feng, Q., Appiah, K., Shen, L., Wang, X., Yip, K., Wang, J., Leung, H., Wong, T., & Poon, L. (n.d.). eP01.03: Cervical angles in the first trimester to screen spontaneous preterm birth. Ultrasound in obstetrics & gynecology, 60, 85–86. http://access.bl.uk/ark:/81055/vdc_100163728876.0x000037