الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e04c28b025d7503696ccebb5f0b25e33Testhttp://europepmc.org/articles/PMC6429848Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::931e6c805e0c13d7ff64b14c61640458Testhttp://europepmc.org/articles/PMC6475166Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f59c892c682a85c33616fc4aa7df6218Testhttps://doi.org/10.1136/bmjopen-2018-024673Test