This launch reveals Google's knol, a user contributed content platform, suggesting a new approach to online information sharing.
So, Google's Knol is now live (see this announcement on Google's Blog). There'll be comment aplenty about the merits of this service and how it compares to other user contributed content sites.
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Tony Hammond (2008) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: