Ambrosini, A. et al. 2020. Effects of galcanezumab on acute medication use and health care resource utilization in treatment-resistant migraine: results from randomized, double blind, placebo-controlled clinical trial, conquer. Headache Medicine. 11, Supplement (Nov. 2020), 27. DOI:https://doi.org/10.48208/HeadacheMed.2020.Supplement.27.