Foxo transcription factors induce the atrophy-related ubiquitin ligase atrogin-1 and cause skeletal muscle atrophy - Sandri, M; Sandri, C; Gilbert, A; Skurk, C; Calabria, E; Picard, A; Walsh, K; Schiaffino, S; Lecker, S H; Goldberg, A L (Cell, 2004)