Leptin concentrations in relation to body mass index and the tumor necrosis factor-alpha system in humans. - Mantzoros,C.S.; Moschos,S.; Avramopoulos,I.; Kaklamani,V.; Liolios,A.; Doulgerakis,D.E.; Griveas,I.; Katsilambros,N.; Flier,J.S. (J Clin Endocrinol Metab, 1997)