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O'Brien JM Jr, Welsh CH, Fish RH, Ancukiewicz M, Kramer AM; National Heart, Lung, and Blood Institute Acute Respiratory Distress Syndrome Network.O'Brien JM Jr, et al. Among authors: welsh ch.Ann Intern Med. 2004 Mar 2;140(5):338-45. doi: 10.7326/0003-4819-140-5-200403020-00009.Ann Intern Med. 2004.PMID: 14996675Clinical Trial.