2024 Yes Fractional exhaled nitric oxide (FeNO) among elementary school children in Stockholm: Associations with asthma, allergies, and home and school environment https://doi.org/10.1016/j.scitotenv.2025.179113 Bloom, Erica Europe Observational Exposure Experimental Students Elementary (K-5) Particulate Matter (PM) Carbon Dioxide (CO2) Temperature Humidity Bacteria Respiratory symptoms Respiratory symptoms Allergy School environment endotoxin PM10 FeNO was measured in 415 Swedish schoolchildren and linked to asthma, allergy, and environmental factors. FeNO rose with asthma, allergy, PM10, and Gram-negative bacteria, with effects modified by sex, parental allergy, home dampness, and housing type. 2025