title: Editorial comment.
authors.affiliation: Division of Urology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
authors.forename: Michael C
authors.initials: MC
authors.lastname: Carr
mesh_terms: D005260:Female; D006801:Humans; D006869:Hydronephrosis / Q000000981:diagnostic imaging*; D008297:Male; D017410:Practice Guidelines as Topic; D011247:Pregnancy; D016216:Ultrasonography, Prenatal / Q000379:methods*; D014521:Urethra / Q000000981:diagnostic imaging*; D001743:Urinary Bladder / Q000000981:diagnostic imaging*; D014552:Urinary Tract Infections / Q000209:etiology*; D014567:Urography / Q000009:adverse effects*