title: Ectopic pregnancy: a look at changing concepts and problems.
authors.affiliation: Department of Obstetrics and Gynecology, Portsmouth Naval Hospital, VA 23708.
authors.forename: R J
authors.initials: RJ
authors.lastname: Stock
mesh_terms: D004630:Emergencies; D005260:Female; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000175:diagnosis / Q000453:epidemiology / Q000601:surgery