00434nas a2200157   4500000000100000000000100001008004100002100001500043700001500058700001600073700001600089245013900105300001100244490000700255022001400262       2009                            d1 aD. Kernick1 aS. Stapley1 aJ. Campbell1 aW. Hamilton00aWhat happens to new-onset headache in children that present to primary care? A case-cohort study using electronic primary care records  a1311-60 v29  a0333-1024