| AhR | aryl hydrocarbon receptor |
| AD | atopic dermatitis |
| CO | carbon monoxide |
| IFN-γ | interferon gamma |
| ISAAC | International Study of Asthma and Allergies in Children |
| MDA | malondialdehyde |
| NO2 | nitrogen dioxide |
| O3 | ozone |
| OR | odds ratio |
| PAH | polycyclic aromatic hydrocarbons |
| PM | particulate matter |
| PM2.5 | particulate matter less than 2.5 microns in diameter |
| PM10 | particulate matter less than 10 micron in diameter |
| ROS | reactive oxygen species |
| SO2 | sulfur dioxide |
| TEWL | transepidermal water loss |
| TRAP | traffic-related air pollutants |
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