Insulinotropic glucagon-like peptide 1 agonists stimulate expression of homeodomain protein IDX-1 and increase islet size in mouse pancreas. - Stoffers,D.A.; Kieffer,T.J.; Hussain,M.A.; Drucker,D.J.; Bonner-Weir,S.; Habener,J.F.; Egan,J.M. (Diabetes, 2000)