Efficacy and Safety of Atezolizumab Plus Bevacizumab Following Disease Progression on Atezolizumab or Sunitinib Monotherapy in Patients with Metastatic Renal Cell Carcinoma in IMmotion150: A Randomized Phase 2 Clinical Trial - Powles, Thomas; Atkins, Michael B.; Escudier, Bernard; Motzer, Robert J.; Rini, Brian I.; Fong, Lawrence; Joseph, Richard W.; Pal, Sumanta K.; Sznol, Mario; Hainsworth, John; Stadler, Walter M.; Hutson, Thomas E.; et al. (European Urology, 2021)