1. Effects of ambient PM1 air pollution on daily emergency hospital visits in China: an epidemiological study 
Gongbo Chen, MPH, Shanshan Li, PhD, Yongming Zhang, MD, Wenyi Zhang, PhD, Daowei Li, MD, Xuemei Wei, MD, Yong He, MD, Michelle L Bell, PhD, Gail Williams, PhD, Guy B Marks, PhD, Bin Jalaludin, PhD, Michael J Abramson, PhD, Dr Yuming Guo, PhD 
The Lancet Planetary Health 
Volume 1, Issue 6, Pages e221-e229 (September 2017)
DOI: /S (17)
Copyright © 2017 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY-NC-ND 4.0 license Terms and Conditions

2. Figure 1
Mean daily concentrations of PM1 and PM2·5 (μg/m3) in 26 cities in China during the study period
PM1=particulate matter with aerodynamic diameter less than 1 μm. PM2·5=particulate matter with aerodynamic diameter less than 2·5 μm.
The Lancet Planetary Health 2017 1, e221-e229DOI: ( /S (17) )
Copyright © 2017 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY-NC-ND 4.0 license Terms and Conditions

3. Figure 2
Pooled relative risks of emergency hospital visits associated with a 10 μg/m3 increase in PM1, PM1–2·5, or PM2·5
Error bars are 95% CIs. PM1=particulate matter with aerodynamic diameter less than 1 μm. PM2·5=particulate matter with aerodynamic diameter less than 2·5 μm.
The Lancet Planetary Health 2017 1, e221-e229DOI: ( /S (17) )
Copyright © 2017 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY-NC-ND 4.0 license Terms and Conditions

4. Figure 3
Forest plot for cumulative relative risks (95% CIs) of emergency hospital visits associated with a 10 μg/m3 increase in PM1 and PM2·5 at lag 0–2 day
Corresponding names of hospitals are shown in the appendix (p 1). RR=relative risk. PM1=particulate matter with aerodynamic diameter less than 1 μm.
The Lancet Planetary Health 2017 1, e221-e229DOI: ( /S (17) )
Copyright © 2017 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY-NC-ND 4.0 license Terms and Conditions

5. Figure 4
Pooled relative risks of emergency hospital visits associated with a 10 μg/m3 increase in PM1 and PM2·5 at lag 0–2 days stratified by sex and age groups
Error bars are 95% CIs. PM1=particulate matter with aerodynamic diameter less than 1 μm. PM2·5=particulate matter with aerodynamic diameter less than 2·5 μm.
The Lancet Planetary Health 2017 1, e221-e229DOI: ( /S (17) )
Copyright © 2017 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY-NC-ND 4.0 license Terms and Conditions