over years of research, scientists discovered that cgrp helps transmit pain signals in the brain. .
speaking after a four-day inquest, the family of brigid cavanagh, who died on july 20, 2016, said the western health trust should be ashamed after the 83-year-old had died in "terror". .
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the outbreak killed 20 and sickened 577 people between november 2016 and october 2017. . .
the coroner's report did not specify what made the vape pen explode. .