title: Editorial comment.
authors.forename: Jeffrey B
authors.initials: JB
authors.lastname: Campbell
mesh_terms: D005260:Female; D006801:Humans; D007670:Kidney Calices / Q000000981:diagnostic imaging*; D011247:Pregnancy; D016216:Ultrasonography, Prenatal; D014517:Ureteral Obstruction / Q000601:surgery*