Comparison of pregnenolone sulfate, pregnanolone and estradiol levels between patients with menstrually-related migraine and controls: an exploratory study. - Rustichelli, Cecilia; Bellei, Elisa; Bergamini, Stefania; Monari, Emanuela; Lo Castro, Flavia; Baraldi, Carlo; Tomasi, Aldo; Ferrari, Anna (Journal of Headache & Pain, 2021)