Published on in Vol 9 (2023)
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/47022, first published
.
![Associations Between Hourly Ambient Particulate Matter Air Pollution and Ambulance Emergency Calls: Time-Stratified Case-Crossover Study Associations Between Hourly Ambient Particulate Matter Air Pollution and Ambulance Emergency Calls: Time-Stratified Case-Crossover Study](https://asset.jmir.pub/assets/448904a083205f5eb26570ed17cf1c7c.png 480w,https://asset.jmir.pub/assets/448904a083205f5eb26570ed17cf1c7c.png 960w,https://asset.jmir.pub/assets/448904a083205f5eb26570ed17cf1c7c.png 1920w,https://asset.jmir.pub/assets/448904a083205f5eb26570ed17cf1c7c.png 2500w)
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