over years of research, scientists discovered that cgrp helps transmit pain signals in the brain. .
chronic traumatic encephalopathy (cte), a degenerative brain disease, has been linked by medical researchers to the sort of hits football players endure. . .
three other countries � spain, czech republic, and slovakia � had also been warned by the eu, but devised sufficient air management plans within the requested time frame. . .
a sign at a planned parenthood clinic is pictured in oklahoma city, in 2015. .