Pharmacokinetic and pharmacodynamic properties of multiple oral doses of sitagliptin, a dipeptidyl peptidase-IV inhibitor: a double-blind, randomized, placebo-controlled study in healthy male volunteers. - Bergman,AJ.; Stevens,C.; Zhou,Y.; Yi,B.; Laethem,M.; Smet,M De.; Snyder,K.; Hilliard,D.; Tanaka,W.; Zeng,W.; Tanen,M.; Wang,AQ.; et al. (Clin Ther, 2006)