I'm sorry for what you're going through. I've been looking into the mercury toxicity issues myself lately. I've had three different doctors plus a poison control center all tell me a different way to test for mercury. All said the others tests were invalid. Some say to use a DMSA provoking agent, others say absolutely not. Some say 6 hour urine test with DMSA, or a 24 hour urine test without DMSA, or a one time blood draw, etc. I am totally confused on this issue and do not know where to get a straight answer. I would not think this is such a difficult issue to test. I'd also appreciate any help.