supernatant
A study was undertaken to determine whether       markers of NO metabolism (NO in exhaled air, iNOS expression in sputum cells, and       nitrite + nitrate (NO2-/NO3-) in sputum supernatant) are increased in subjects       with COPD, and whether they correlate with inflammatory indices in induced       sputum.
A study was undertaken to determine whether       markers of NO metabolism (NO in exhaled air, iNOS expression in sputum cells, and       nitrite + nitrate (NO2-/NO3-) in  @OBJECT$  @PREDICAT$  @SUBJECT$ ) are increased in subjects       with COPD, and whether they correlate with inflammatory indices in induced       sputum.