A Case of Complete Remission of Bilateral Upper Tract Carcinoma In Situ Following Retrograde Bacillus Calmette–Guérin ( <scp>BCG</scp> ) Instillation via Open‐Ended Ureteral Catheters After Failure Using Double‐J StentsNanaka Katsurayama, Tsunenori Kondo, Kazutaka Nakamura et al.|IJU Case Reports|2025Cited by 0