I had a hair test done from a different lab since the physician I used didn't work with Doctors Data labs. I used Cutler's Hair Test Interpretation book to go through the results, and although I didn't apply the counting rules as described in his book, I was still able to apply the general concepts provided to get meaningful information from my hair test.

I also found all the other information in the book helpfu, like all the sources for heavy metal exposure, symptoms of exposure, and mineral information.