الإتاحة: https://doi.org/10.1186/s13148-021-01040-6Testhttps://doi.org/10.13039/501100000780Testhttps://doi.org/10.13039/501100004587Testhttps://doi.org/10.13039/501100011011Testhttp://hdl.handle.net/10261/265803Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5943a3b8d560ced4eae11d8d636e9cfdTesthttp://hdl.handle.net/10261/265803Test