Pembrolizumab monotherapy versus chemotherapy for treatment of advanced urothelial carcinoma with disease progression during or following platinum-containing chamotherapy. A Cochrane Rapid Review.Vikram Narayan, Philipp Dahm, Nicole Skoetz, Michael C Risk, Connie Bongiorno, Neil Patel, Jae Hung Jung, Gerald Gartlehner, and Frank KunathPublished online: 1 November 2017DOI: 10.1002/14651858.CD012838