I came across this while looking for migraine headache information a while back... I know it doesn't really fit what you are researching but is from Beth Israel Deaconess Medical Center --- a Teaching Hospital of Harvard Medical School... maybe the doctor in the article can help your son find an answer...at least maybe able to point you in the right direction.

Here is the link...
http://www.thebostonchannel.com/beth...41/detail.html

I hope your son finds answers and relief soon...

Abbie