As someone who suffers from cluster headaches, I'm very happy to see this research being done. About three years ago, I was getting 4 or 5 headaches a day, most of them during work, and I spent months doing nearly nothing but researching what's involved with cluster headaches and what drugs have an effect. Sadly, there just hasn't been enough research done, but there's plenty of anecdotal evidence.<p>Hopefully something comes out of this; no one should have to deal with cluster headaches. I haven't had a full-blown cluster in nearly two years now (knock on wood), but many people suffer constantly. I can only hope there's a treatment that actually works soon.