Clinical activity of nivolumab in patients with non-clear cell renal cell carcinoma =================================================================================== * Vadim S. Koshkin * Pedro C. Barata * Tian Zhang * Daniel J. George * Michael B. Atkins * William J. Kelly * Nicholas J. Vogelzang * Sumanta K. Pal * JoAnn Hsu * Leonard J. Appleman * Moshe C. Ornstein * Timothy Gilligan * Petros Grivas * Jorge A. Garcia * Brian I. Rini