Update on Relapses in Unilateral Nephroblastoma Registered in 3 Consecutive SIOP/GPOH Studies – A Report from the GPOH-Nephroblastoma Study Group - Furtwängler, R.; Nourkami, N.; Alkassar, M.; von Schweinitz, D.; Schenk, J.-P.; Rübe, C.; Siemer, S.; Leuschner, I.; Graf, N. (Klinische Pädiatrie, 2011)