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Sammer, Ulla, Matthias Walter, Stephanie C. Knüpfer, Ulrich Mehnert, Beata Bode-Lesniewska, ja Thomas M. Kessler. "Do We Need Surveillance Urethro-Cystoscopy in Patients With Neurogenic Lower Urinary Tract Dysfunction?" PLoS One 2015.

Sammer, Ulla, et al. "Do We Need Surveillance Urethro-Cystoscopy in Patients With Neurogenic Lower Urinary Tract Dysfunction?" PLoS One 2015.