The Journal of Headache and Pain, Vol 20, Iss 1, Pp 1-9 (2019) The Journal of Headache and Pain Larsen, E L, Ashina, H, Iljazi, A, Al-Khazali, H M, Seem, K, Ashina, M, Ashina, S & Schytz, H W 2019, ' Acute and preventive pharmacological treatment of post-traumatic headache : a systematic review ', Journal of Headache and Pain, vol. 20, 98 . https://doi.org/10.1186/s10194-019-1051-7