Cold-induced PGC-1alpha expression modulates muscle glucose uptake through an insulin receptor/Akt-independent, AMPK-dependent pathway - Oliveira, R L; Ueno, M; de Souza, C T; Pereira-da-Silva, M; Gasparetti, A L; Bezzera, R M; Alberici, L C; Vercesi, A E; Saad, M J; Velloso, L A (Am J Physiol, 2004)