Complex sentence: While the content is subject to peer review (and is counted as such in many university assessments of research output), the articles published are often summaries of research previously published elsewhere, and material published must be accessible and relevant to a broad readership.
Split into simpler sentences: While the content is subject to peer review (and is counted as such in many university assessments of research output), the articles published are often summaries of research that may also be published elsewhere. Material published must be accessible and relevant to a broad readership.