By the way -- for anyone interested in researching tDCS, TMS, etc. -- it is a relatively recent book that can certainly get you started. I got copy to read through interlibrary loan… name of it is:

Pain. Brain Stimulation in the Treatment of Pain

Editors: Helena Knotkova, et. al. , publisher is NOVA … publication date is 2010 -- so it is pretty close to being up to date.

It is a easy source for good summary articles. Includes a chapter on tDCS for CRPS, another one on tDCS for fibromyalgia pain, another one on safety of tDCS…….. you can look it up on Amazon.