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APA Citation
Sumigama, S., Enomoto, A., Matsukawa, S., Ushida, T., Imai, K., Nakano, T., Kotani, T., & Kikkawa, F. (2019). a rare pseudo tumour in the extraembryonic coelom in first trimester of pregnancy: ultrasound and pathology. Journal of obstetrics and gynaecology, 39, 545–546. http://access.bl.uk/ark:/81055/vdc_100079919437.0x000063