Leptin binding activity changes with age: the link between leptin and puberty - Quinton,N.D.; Smith,R.F.; Clayton,P.E.; Gill,M.S.; Shalet,S.; Justice,S.K.; Simon,S.A.; Walters,S.; Postel-Vinay,M.C.; Blakemore,A.I.; Ross,R.J. (J Clin Endocrinol Metab, 1999)