Glucagon cell adenomatosis: a newly recognised disease of the endocrine pancreas - Henopp, T; Anlauf, M; Schmitt, A; Schlenger, R; Zalatnai, A; Couvelard, A; Ruszniewski, P; Schaps, K P; Jonkers, Y M; Speel, E J; Pellegata, N S; Heitz, P U; Komminoth, P; Perren, A; Klöppel, G (J Clin Endocrinol Metab, 2009)