NCT01977482: A Phase IIB, Randomized, Blinded, Dose-ranging, Active-controlled, Parallel-group, Multi-center Study to Evaluate the Dose Response Relationship of GSK1278863 Over the First 4 Weeks of Treatment and Evaluate the Safety and Efficacy of GSK1278863 Over 24 Weeks in Hemodialysis-Dependent Subjects With Anemia Associated With Chronic Kidney Disease Who Switch From Recombinant Human Erythropoietin | TrialSignal