Additive insulinotropic effects of exogenous synthetic human gastric inhibitory polypeptide and glucagon-like peptide-1-(7-36) amide infused at near-physiological insulinotropic hormone and glucose concentrations. - Nauck,M.A.; Bartels,E.; Ørskov,C.; Ebert,R.; Creutzfeldt,W. (J Clin Endocrinol Metab, 1993)