الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00499d287ecc399d84fe22122d919722Testhttp://europepmc.org/articles/PMC5637322Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d443bc47ddbf112a099e1e1ca7687466Testhttp://europepmc.org/articles/PMC4506413Test