| http://www.w3.org/ns/prov#value | - More recently, Petersen and colleagues (2007b) have described significant upregulation of IL18 in quadriceps muscle samples obtained from patients with moderate to severe COPD. The reasons behind these contradictory results are as yet unclear, but factors such as the use of relatively low numbers of patients, the presence or absence of hypoxemia, severe weight loss, exacerbation of pulmonary manif
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