Memon K, Kulik LM, Lewandowski RJ, Wang E, Wang J, Ryu RK, Hickey R, Vouche M, Baker T, Ganger D, Gates VL, Habib A, Mulcahy MF, Salem R. Comparative study of staging systems for hepatocellular carcinoma in 428 patients treated with radioembolization. J Vasc Interv Radiol. 2014 Jul; 25(7):1056-66.