Targeted expression of placental lactogen in the beta cells of transgenic mice results in beta cell proliferation, islet mass augmentation, and hypoglycemia. - Vasavada,R.C.; Garcia-Ocaña,A.; Zawalich,W.S.; Sorenson,R.L.; Dann,P.; Syed,M.; Ogren,L.; Talamantes,F.; Stewart,A.F. (J Biol Chem, 2000)