الوصول الحر: https://doaj.org/article/323db09f8ee14f7d97dbd3642f0f75f1Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::833b3298622be8ffdda0f417b66796b7Testhttps://pubmed.ncbi.nlm.nih.gov/33741044Test