good chronic migraine transformation info

http://www.uptodate.com/contents/chronic-migraine?source=search_result&selectedTitle=5%7E150

Can you guys access this link? I am on my computer at school so I can't tell whether I can access because we have a subscription or whether the general public can access it.

Anyway, if you can see it, I think it has really good information on the pathogenesis of transformation to chronic migraine and treatment strategies.

i tried, you can read a little but then have to subscribe to continue. unfortunate.