Nature Medicine and Nature Reviews Neuroscience present a special supplement on Neurodegeneration. The supplement, sponsored by AstraZeneca, provides an authoritative update on the molecular processes that underlie the most frequent neurodegenerative diseases, and points to approaches that might help to treat these conditions. The online version of the supplement will be freely available for a period of three months. http://www.nature.com/focus/neurodegen/ ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn