الإتاحة: https://doi.org/20.500.12613/5543Testhttps://hdl.handle.net/20.500.12613/5543Test
الإتاحة: https://doi.org/10.1007/s00592-016-0899-0Testhttp://hdl.handle.net/11695/107097Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81715d02d6f4d20ecd493c903ca35da0Testhttps://pubmed.ncbi.nlm.nih.gov/27718051Test
الإتاحة: https://doi.org/10.1056/NEJMoa1205409Testhttp://hdl.handle.net/11573/1150646Test