الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4fabfdcd4763f9c080c44f8cab861f4Testhttp://europepmc.org/articles/PMC4102439Test
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الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::903f5bd8a29242dd1f71d1969d2ab3ffTesthttp://europepmc.org/articles/PMC3139597Test