URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ca3665f2ebb57c4b9de79398364dac2http://europepmc.org/articles/PMC6231559
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::731061adde93cb97f1382717e6bef5cbhttp://europepmc.org/articles/PMC4024599
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70c48ac6006c1ca8e5ddd6c7b304148fhttps://doi.org/10.1136/bmjopen-2013-003690