Inhibition of dipeptidyl peptidase IV improves metabolic control over a 4 week study period in type 2 diabetes. - Ahrén,B.; Simonsson,E.; Larsson,H.; Landin-Olsson,M.; Torgeirsson,H.; Jansson,P.A.; Sandqvist,M.; Båvenholm,P.; Efendic,S.; Eriksson,J.W.; Dickinson,S.; Holmes,D. (Diabetes Care, 2002)