"we were quite surprised to find there were no significant differences," says study author .
over years of research, scientists discovered that cgrp helps transmit pain signals in the brain. .
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may 17, 2018 -- the fda has approved the first in a new class of migraine drugs that aim to fight painful .
"we were quite surprised to find there were no significant differences," says study author .
over years of research, scientists discovered that cgrp helps transmit pain signals in the brain. .