While the evolving information society is freely opening and sharing its diaries, social networks and source codes, it remains to be seen if the same will come true for scientific knowledge. Despite strong sympathy for the idea, scientists balk at Open Access publishing. Here we shed some light on why this is so.
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Mann et al. (2009) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: