Analysis of the effects of androgens and training on myostatin propeptide and follistatin concentrations in blood and skeletal muscle using highly sensitive immuno PCR - Diel, P; Schiffer, T; Geisler, S; Hertrampf, T; Mosler, S; Schulz, S; Wintgens, K F; Adler, M (Mol Cell Endocrinol, 2010)