Causal relationship between asthma outpatient visits and air pollution with instrumental variable approach

Asthma outpatient visit data can be accessed by requesting data access to NHIS with the IRB. Other data and analysis codes are available upon request from the corresponding author. Appendix S1. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.