Levels of leptin in maternal serum, amniotic fluid, and arterial and venous cord blood: relation to neonatal and placental weight. - Schubring,C.; Kiess,W.; Englaro,P.; Rascher,W.; Dotsch,J.; Hanitsch,S.; Attanasio,A.; Blum,W.F. (J Clin Endo Metab, 1997)