Efficacy and safety of rivaroxaban vs. warfarin in patients with non-valvular atrial fibrillation and a history of cancer: observations from ROCKET AF. Chen, S.T., Hellkamp, A.S., Becker, R.C., Berkowitz, S.D., Breithardt, G., Fox, K.A., Hacke, W., Halperin, J.L., Hankey, G.J., Mahaffey, K.W. and Nessel, C.C., 2018. European Heart Journal-Quality of Care and Clinical Outcomes, 5(2), pp.145-152.