Fig. 2From: Effects of urban fine particulate matter and ozone on HDL functionalityEffect of PM2.5 exposure on HDL antioxidant and anti-inflammatory function. a Change in HOI from before and 1 h after exposures. b Change in HOI from before and 20 h after exposures. c and d HOI from before and 1 h after exposures are shown in a subset where average pre HOI is <1.5 (c) and <2.0 (d). FA = filtered airBack to article page