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APA Citation
Gil, M. M., Revello, R., Poon, L. C., Akolekar, R., & Nicolaides, K. H. (2016). clinical implementation of routine screening for fetal trisomies in the UK NHS: cell‐free DNA test contingent on results from first‐trimester combined test. Ultrasound in obstetrics & gynecology, 47, 45–52. http://access.bl.uk/ark:/81055/vdc_100028386946.0x000045