Circulating irisin in relation to insulin resistance and the metabolic syndrome - Hee Park, K; Zaichenko, L; Brinkoetter, M; Thakkar, B; Sahin-Efe, A; Joung, K E; Tsoukas, M A; Geladari, E V; Huh, J Y; Dincer, F; Davis, C R; Crowell, J A; Mantzoros, C S (J Clin Endocrinol Metab, 2013)