Circulating irisin in healthy, young individuals: day-night rhythm, effects of food intake and exercise, and associations with gender, physical activity, diet, and body composition - Anastasilakis, A D; Polyzos, S A; Saridakis, Z G; Kynigopoulos, G; Skouvaklidou, E C; Molyvas, D; Vasiloglou, M F; Apostolou, A; Karagiozoglou-Lampoudi, T; Siopi, A; Mougios, V; Chatzistavridis, P; Panagiotou, G; Filippaios, A; Delaroudis, S; Antzoros, C S (J Clin Endocrinol Metab, 2014)