Figure 3From: Effects of wood smoke particles from wood-burning stoves on the respiratory health of atopic humans Mean values of Fractional Exhale NO measurements: FENO50 (A) and FENO270 (B) are shown at baseline and at the end of exposure (3½ hours) for the 3 exposures to clean filtered air, low and high concentrations of wood smoke. Error bars represent +1 SEM.Back to article page