PT - JOURNAL ARTICLE ED - , TI - An Open Question DP - 2006 Sep 06 TA - The Journal of Neuroscience PG - 9077--9077 VI - 26 IP - 36 4099 - http://www.jneurosci.org/content/26/36/9077.short 4100 - http://www.jneurosci.org/content/26/36/9077.full SO - J. Neurosci.2006 Sep 06; 26