الإتاحة: https://doi.org/10.1016/j.jaccas.2020.12.029Testhttps://api.elsevier.com/content/article/PII:S2666084921000176?httpAccept=text/xmlTesthttps://api.elsevier.com/content/article/PII:S2666084921000176?httpAccept=text/plainTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=pmc_________::9fda6f9cab97ab1487ed77234899b887Testhttp://europepmc.org/articles/PMC6448503Test
الإتاحة: https://doi.org/10.1016/j.bbr.2010.08.016Testhttps://api.elsevier.com/content/article/PII:S0166432810005759?httpAccept=text/xmlTesthttps://api.elsevier.com/content/article/PII:S0166432810005759?httpAccept=text/plainTest