الوصول الحر: https://doaj.org/article/3ed9226118b54dfa977eaec2c0cb207cTest
الوصول الحر: https://doaj.org/article/a1a923724d3d480b90ec1bbf1d0731fcTest
الإتاحة: https://doi.org/10.1186/s13018-023-04420-1Testhttps://doaj.org/article/b7894925934041648ce70c463fbb43fcTest