Sci. STKE, 5 August 2003
The following correction should be noted for the Perspective by Mirshahi et al.:
The online full text view of the article has been corrected. A corrected PDF is available starting August 26, 2003.
A PDF of the originally published article with the original text is also available at http://stke.sciencemag.org/cgi/data/sigtrans;2003/194/pe32/DC1/1
Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882