Fig. 4From: Respiratory function declines in children with asthma associated with chemical species of fine particulate matter (PM2.5) in Nagasaki, JapanBox plots for PM2.5 total mass and five chemical species by clusters in (A) Nagasaki city and (B) Isahaya city. NE China: Northeast China. RUS-MNG: Russia passed through Mongolia and North China. CHN-KOR: North China passed through East of the Korea peninsula. Conc: concentrationBack to article page