Please have a look at this link folks.  I seriously hope it helps.
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Hi Brian,
               it was a current affair the other nite about cluster headaches, they interviewed a couple of sufferers, explained about how it effects sufferers, about 5-6 minutes worth, it was good to get it out there and for people to hear about it,  but like most things on current affair, it was basically a paid advert, for some doctor saying that botox is now a new revolutional answer !!!!!!!
they didn't give the clinical trial test results from 5 odd years ago, where less than 10% had relief from botox, but again, at least its making the public aware,    and good luck to those that do get relief from it, certainly not knocking them,   but,    still a paid advert......

colin