[A study of the mechanisms of the vesicoureteral reflux through ultrasonographic investigation of the intravesical ureter].
D006801:Humans; D014463:Ultrasonography; D014513:Ureter / Q000503:physiopathology*; D014718:Vesico-Ureteral Reflux / Q000175:diagnosis / Q000209:etiology* / Q000517:prevention & control