Hagan, J. (2021). Letter to the Editor: A Randomized, Double-Blinded, Placebo-Controlled, Cross Over Study Evaluating the Efficacy and Safety of Timolol Ophthalmic Solution as an Acute Treatment of Migraine. Kansas Journal of Medicine, 13(S2), 29-30. https://doi.org/10.17161/kjm.vol1315733