Expression of ghrelin and of the GH secretagogue receptor by pancreatic islet cells and related endocrine tumors. - Volante,M.; Allia,E.; Gugliotta,P.; Funaro,A.; Broglio,F.; Deghenghi,R.; Muccioli,G.; Ghigo,E.; Papotti,M. (J Clin Endocrinol Metab, 2002)