Dietary alteration of n-3 and n-6 fatty acids for headache reduction in adults with migraine: randomized controlled trial. - Ramsden CE; Zamora D; Faurot KR; MacIntosh B; Horowitz M; Keyes GS; Yuan ZX; Miller V; Lynch C; Honvoh G; Park J; Levy R; et al. (BMJ (Clinical research ed.), 2021)