title: Expanding the spectrum of ureteropelvic junction obstruction in duplex systems.
authors.forename: J W
authors.initials: JW
authors.lastname: Ng
authors.forename: C H
authors.initials: CH
authors.lastname: Cheung
mesh_terms: D002675:Child, Preschool; D003251:Constriction, Pathologic; D004106:Dilatation; D005260:Female; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology*; D007682:Kidney Pelvis / Q000002:abnormalities*; D009392:Nephrectomy; D014513:Ureter / Q000002:abnormalities*