الوصول الحر: https://doaj.org/article/6df59b97a95c420b96554ca7e0774663Test
الوصول الحر: https://doaj.org/article/d40d713143964c6fa54b52b7061885f9Test
الوصول الحر: https://doaj.org/article/25cd01820d8a4e08bd83548bf7148d7cTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f438d082c33110068eb9868a1a45a9cfTesthttps://pubmed.ncbi.nlm.nih.gov/33287783Test