Info needed on RSD (reflex sympathetic disorder)

A friend asked me last night to find some info on this disorder because his brother has been diagnosed with it.

As I post this, I am looking for info on the web. We are not looking for medical advice, just general info.

I would appreciate any info from Dopers who have this, or are familiar with the disorder. I could be wrong on the name.

The docs on the board are welcome to weigh in, and I will say again, I am not looking for medical advice, just general information. Thanks in advance.