A Phase II, single-arm study of nivolumab in patients with metastatic or unresectable urothelial cancer who have progressed following treatment with a platinum agent. (4th November 2015) - Sharma, Padmanee; Grimm, Marc-Oliver; Galsky, Matthew D; Baron, Ari; Bracarda, Sergio; Siefker-Radtke, Arlene; Lambert, Alexandre; Azrilevich, Alex; Retz, Margitta