I'm still on a life-long study program thru USC. I get checked every 5 years. The study started back in 1979 when it was thought that Stoddard Solvent is a hazardous material. Now it is. Anyway the only thing they think I may have developed from using that stuff daily for parts washing is a first stage heart block. It hasn't gotten any worse in 10+ years. When I die they will do a very thorough scientific autopsy. There were 30 of us in the original group. Half are already gone. They don't tell us what they find.