Correction to: Nature Medicine, published online 31 July 2011.

In the version of the article initially published, there was an error in Fig. 1a where the “Actin” blot mistakenly replicated the “Akt” blot; the original and revised panels are shown as Fig. 1 below. There was also an error in the caption for Fig. 1b where the text “refeeding after 24-h fast” should have read “refeeding after 18-h fast”.

Fig. 1
figure 1

Original and revised Fig. 1a.