الوصول الحر: https://doaj.org/article/4520057ad8c04a0ba36b3c8de04b8fd0Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=pmid________::fd2d6d71aaf095e43ba6b2b538214065Testhttps://pubmed.ncbi.nlm.nih.gov/32411079Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7914fb8b391a0ac340f4035948e25798Testhttps://pubmed.ncbi.nlm.nih.gov/32066105Test