title: Re: Accuracy of first-trimester ultrasound in diagnosis of tubal ectopic pregnancy in the absence of an obvious extrauterine embryo: systematic review and meta-analysis.
authors.affiliation: Department of Radiology, Beth Israel Deaconess Medical Center, Boston, MA, 02215, USA.
authors.forename: D
authors.initials: D
authors.lastname: Levine
authors.affiliation: Department of Radiology, University of Ottawa, The Ottawa Hospital Civic Campus, Ottawa, Ontario, Canada.
authors.forename: M
authors.initials: M
authors.lastname: McInnes
mesh_terms: D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011271:Pregnancy, Ectopic / Q000175:diagnosis; D011274:Pregnancy, Tubal / Q000175:diagnosis*; D014465:Ultrasonics; D014463:Ultrasonography