Body fat mass and macronutrient intake in relation to circulating soluble leptin receptor, free leptin index, adiponectin, and resistin concentrations in healthy humans - Yannakoulia, M; Yiannakouris, N; Bluher, S; Matalas, A L; Klimis-Zacas, D; Mantzoros, C S (J Clin Endocrinol Metab, 2003)