The assay may be employed to detect an endogenous leukocyte elastase produced fibrinogen cleavage peptide signal in normal human plasma and at {HEAD ~ elevated levels} in cystic fibrosis plasma and in {TAIL ~ rheumatoid arthritis synovial fluid samples} 
in
The assay may be employed to detect an endogenous leukocyte elastase produced fibrinogen cleavage peptide signal in normal human plasma and at { HEAD ~ elevated levels } in cystic fibrosis plasma and in { TAIL ~ rheumatoid arthritis synovial fluid samples }
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