الوصول الحر: https://doaj.org/article/cbb951e83afd4d55ac404576ec3a25f4Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::afe41bb6409b92ac9e12d39e4dc7ec75Testhttps://pubmed.ncbi.nlm.nih.gov/32859186Test