الوصول الحر: https://doaj.org/article/246bb19780b944e9824193eed2a943acTest
الوصول الحر: https://doaj.org/article/57e300eef97b4e0989ccba29b46f65a9Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::7311672e0b4ca4200ec1cad3542eb010Testhttps://doi.org/10.1016/s0167-8140Test(22)02922-x
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::92bef11fa1da7d776eee0ef0502e84d6Testhttps://doi.org/10.1136/archdischild-2014-307384.444Test