Editor's Note: Toolboxes are a new, occasional feature in the Journal designed to briefly highlight a new method or a resource of general use in neuroscience or to critically analyze existing approaches or methods. For more information, see [http://www.jneurosci.org/misc/sifa_features.shtml][1].
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Rhodes et al. (2006) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: