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Nussbaumer-Ochsner Y, Latshang TD, Ulrich S, Kohler M, Thurnheer R, Bloch KE.Nussbaumer-Ochsner Y, et al. Among authors: thurnheer r.Chest. 2012 Jan;141(1):131-138. doi: 10.1378/chest.11-0375. Epub 2011 Jun 9.Chest. 2012.PMID: 21659435Clinical Trial.