Apelin Serum Levels are not Associated with Early Atherosclerosis or Fat Distribution in Young Subjects with Increased Risk for Type 2 Diabetes - Rittig, K.; Hildebrandt, U.; Thamer, C.; Staiger, H.; Peter, A.; Stefan, N.; Fritsche, A.; Häring, H.-U.; Balletshofer, B. M.; Siegel-Axel, D. (Experimental and Clinical Endocrinology & Diabetes, 2011)