Correction

NEUROBIOLOGY. For the article “Neural stem cells display extensive tropism for pathology in adult brain: Evidence from intracranial gliomas” by Karen S. Aboody, Alice Brown, Nikolai G. Rainov, Kate A. Bower, Shaoxiong Liu, Wendy Yang, Juan E. Small, Ulrich Herrlinger, Vaclav Ourednik, Peter McL. Black, Xandra O. Breakefield, and Evan Y. Snyder, which appeared in number 23, November 7, 2000, of Proc. Natl. Acad. Sci. USA (97, 12846–12851), the authors note the following correction. The first two authors, Karen S. Aboody and Alice Brown, contributed equally to this work.