Leptin and leptin receptor expression in the normal and neoplastic human pituitary: evidence of a regulatory role of leptin on pituitary cell proliferation. - Jin,L.; Burguera,B.G.; Couce,M.E.; Scheithauer,B.W.; Lamson,J.; Eberhardt,N.L.; Kulig,E.; Lloyd,R.V. (J Clin Endocrinol Metab, 1999)