- Predictability of duration and severity of congenital hydronephrosis as a cause of smooth muscle deterioration in pyelo-ureteral junction obstruction. dell'Agnola, C.A., Carmassi, L., Tadini, B., Ghisoni, L., Carmignani, L. European journal of pediatric surgery : official journal of Austrian Association of Pediatric Surgery ... [et al] = Zeitschrift für Kinderchirurgie. (1992)