| http://www.w3.org/ns/prov#value | - Financial/nonfinancial disclosures: The authors have reported to CHEST the following conflicts of interest: Dr Kimmel has served as a consultant and/or received research funding from several pharmaceutical companies, including Pfizer, Merck, Novartis, GlaxoSmithKline, Centocor, and Bayer, all unrelated to this paper.
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