Cluster areas of NTDs in Heshun County and Yuanping County.

<p>Cluster areas of NTDs in Heshun County and Yuanping County.</p

Sensitivity analysis results based on different spatial filter sizes.

<p>Sensitivity analysis results based on different spatial filter sizes.</p

The largest extent of clustering area in three periods in Heshun County and Yuanping County.

<p>The largest extent of clustering area in three periods in Heshun County and Yuanping County.</p

Two paired sample T test results of the average rate of NTDs before and after intervention in the study areas.

<p>Two paired sample T test results of the average rate of NTDs before and after intervention in the study areas.</p

Location of study areas.

<p>Location of study areas.</p

Factor detector results of NTDs in coal production and transport area.

<p>Factor detector results of NTDs in coal production and transport area.</p