In Saucedo et al. (Nature Cell Biol. 5, 566–571 (2003)), the first two sentences of the abstract should read:

Insulin signalling is a potent stimulator of cell growth and has been proposed to function, at least in part, through the conserved protein kinase TOR (target of rapamycin). Recent studies suggest that the tuberous sclerosis complex Tsc1–Tsc2 may couple insulin signalling to Tor activity.

rather than:

Insulin signalling is a potent inhibitor of cell growth and has been proposed to function, at least in part, through the conserved protein kinase TOR (target of rapamycin). Recent studies suggest a that the tuberous sclerosis complex Tsc1–Tsc2 may couple insulin signalling to Tor activity. This has also been corrected online.