None of the advantages of traditional scientific journals need be sacrificed in order to provide free online access to scientific journal articles. Objections that open access to scientific journal literature requires the sacrifice of peer-review, revenue, copyright protection, or other strengths of traditional journals, are based on misunderstandings.
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Peter Suber (2002) studied this question.
Synapse has enriched 2 closely related papers on similar clinical questions. Consider them for comparative context: