Cite

    K. Grewal et al.. “OC19.02: Is the presence or absence of intracavity fluid associated with a final diagnosis of ectopic pregnancy in women with a pregnancy of unknown location?.” Ultrasound in obstetrics & gynecology, vol. 52, n.d., p. 45. http://access.bl.uk/ark:/81055/vdc_100090054330.0x000025