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APA Citation
Christodoulou, E., Bobdiwala, S., Kyriacou, C., Farren, J., Mitchell‐Jones, N., Ayim, F., Chohan, B., Abughazza, O., Guruwadahyarhalli, B., Al‐Memar, M., Guha, S., Vathanan, V., Gould, D., Stalder, C., Wynants, L., Timmerman, D., Bourne, T., & Van Calster, B. (2021). external validation of models to predict the outcome of pregnancies of unknown location: a multicentre cohort study. BJOG, 128, 552–562. http://access.bl.uk/ark:/81055/vdc_100118928905.0x000024