Kim, B.W. et al. 2015. Effects of Previous or Synchronous Non-Muscle Invasive Bladder Cancer on Clinical Results after Radical Nephroureterectomy for Upper Tract Urothelial Carcinoma: A Multi-Institutional Study. Urology Journal. 12, 4 (Sep. 2015), 2233–2239. DOI:https://doi.org/10.22037/uj.v12i4.2831.