Evaluation of a standardized protocol for the collection and storage of adrenal tumor samples – preparation for an international adrenal tumor bank - Johnsen, I; Hahner, S; Fassnacht, M; Bertherat, J; Shapiro, I; Reincke, M; Allolio, B; Beuschlein, F (Experimental and Clinical Endocrinology & Diabetes, 2006)