Found these interesting articles on mercury. In case you didn't come across these in your research, here they are:
Dr. Mercola is against DMSA, see his protocol in this article:
Mercury Elimination with DMSA
Last week's New England Journal of Medicine had
a report of a 21-year-old dental assistant who attempted suicide by injecting
herself with 10 ml (135 g) of elemental mercury (quicksilver) intravenously.
Another article. This is by William G. Drew, Ph.D. who no longer works for the medical establishment. His story is very interesting. You will find information on mercury and chelation about 1/2 way down the page site.