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I've deleted my mail messages so can't properly thank the person who set up "ourworld" on the Web. What a job! Well done! I was looking through the messages regarding stimulation surgery and found what I think is a misunderstanding, especially perhaps among those whose first language isn't English. The material speaks of the "lead" being implanted. This is not the element, lead (pronounced "led"; chemical symbol Pb); it a wire lead-ing from the stimulator (in the thalamus) to the battery (in the chest). There should be no concern about "lead poisoning" from this surgery. Joanne Sandstrom [log in to unmask]