Figure 1

Mean annual exposure to silica dust in mg m−3-years and radon and its progeny in WLM among exposed cohort members with respect to silica (n=58 677) and radon (n=50 468).
Mean annual exposure to silica dust in mg m−3-years and radon and its progeny in WLM among exposed cohort members with respect to silica (n=58 677) and radon (n=50 468).