Figure 4
From: Investigating surgical smoke in otolaryngology operating rooms

The variation in the average concentration, median value, and interquartile range of the formaldehyde. The horizontal axis is the same as that in Fig. 3.
From: Investigating surgical smoke in otolaryngology operating rooms

The variation in the average concentration, median value, and interquartile range of the formaldehyde. The horizontal axis is the same as that in Fig. 3.