Is headache during pregnancy a higher risk for serious secondary headache cause? A HEAD study report

Kelly, A.M., Chu, K.H., Kuan, W.S., Keijzers, G., Kinnear, F.B., Cardozo‐Ocampo, A. and HEAD Study and HEAD Colombia Investigators, 2022. Is headache during pregnancy a higher risk for serious secondary headache cause? A HEAD study report. Emergency Medicine Australasia.