Skip to main content
letter
. 2021 Nov 22;7(4):00482-2021. doi: 10.1183/23120541.00482-2021

FIGURE 1.

FIGURE 1

Change in black carbon between baseline and post-advice for a) mean overall 24 h, b) home, c) commute and d) school. ns: not significant. *: p<0.05; **: p<0.01.