Part I: bilateral urinary tract obstruction.
D054598:Blue Cross Blue Shield Insurance Plans; D002986:Clinical Trials as Topic; D018795:Device Approval; D005333:Fetus / Q000002:abnormalities* / Q000601:surgery; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology / Q000601:surgery; D017063:Outcome Assessment, Health Care; D015607:Stents; D013673:Technology Assessment, Biomedical; D014481:United States; D014486:United States Food and Drug Administration; D014551:Urinary Tract / Q000002:abnormalities*