Limited prognostic value of the 2004 International Union Against Cancer staging classification for adrenocortical carcinoma: proposal for a Revised TNM ClassificationCancer - Fassnacht, M; Johanssen, S; Quinkler, M; Bucsky, P; Willenberg, H S; Beuschlein, F; Terzolo, M; Mueller, H H; Hahner, S; Allolio, B (2009)