This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
NIOSH. ru cdc gov pdf Coal Mine Dust Exposures and Associated Health Outcomes MSHA NIOSH CWXSP for en Figure Observed and predicted prevalences of CWP category or greater by age group and MSHA District Source Data from the NIOSH CWXSP for Charts based on data provided
Page 2023 Free-images.com. All images are Public Domain