And the incidence of advanced disease also did not change, the researchers found.
"He found that this workforce has a much lower incidence of disease than the general population."
"There are very few things that can so dramatically increase the incidence of new disease," he said.
"We found a correlation between the dose and the incidence of disease," he said.
These areas will see a substantial increase in infectious disease incidence and deaths.
Managing the moisture available to the plant is another way to help reduce the incidence of disease.
It's not known whether this translates into a higher disease incidence or any effect at the population level.
Over the last two decades the incidence of allergic disease has increased in industrialized countries.
Bilateral presentation may have a higher incidence of systemic disease.
Otherwise, there's no sense in measuring it from a point 20 years ago and relating that to the incidence of disease today.