الإتاحة: https://doi.org/10.1164/rccm.201606-1306OCTesthttp://hdl.handle.net/10447/274729Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=pmid_dedup__::c89a02a72061e1d869d8509c0c72b057Testhttps://doi.org/10.1186/s13054-018-2158-yTest
الإتاحة: https://doi.org/10.1001/jama.2016.0291Testhttp://hdl.handle.net/11571/1165481Testhttp://jama.jamanetwork.com/article.aspx?articleid=2492877Test