الإتاحة: https://doi.org/10.1378/chest.14-1119Testhttps://discovery.dundee.ac.uk/en/publications/296f2271-6bb3-45a0-abc4-adacad9ca02eTesthttp://www.scopus.com/inward/record.url?scp=84924859491&partnerID=8YFLogxKTest
الإتاحة: https://doi.org/10.1001/jamainternmed.2013.9043Testhttps://discovery.dundee.ac.uk/en/publications/52d38765-570e-4bee-8e56-c11549f7ef3cTesthttp://www.scopus.com/inward/record.url?scp=84885925964&partnerID=8YFLogxKTest