الوصول الحر: https://doaj.org/article/cfc44241af3d41ab8bc39dc50e3d2d82Test
الوصول الحر: https://doaj.org/article/5c70282e9af14511845c218c2648a983Test
الوصول الحر: https://doaj.org/article/4d83772f28e244608d7af0ddcf23a976Test
الإتاحة: https://doi.org/10.1186/s13287-021-02496-2Testhttps://doaj.org/article/382c99fa8b204f83ad336f6b025d2fe7Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d6395a2f747878c80d37192d9942f63Testhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100006&lng=en&tlng=enTest