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Facial skin blood flow changes measured with laser speckle on (A) glibenclamide-CGRP day and (B) placebo-CGRP day between T0 and T240 min. Blue areas indicate low blood flow, green moderate blood flow, and red high blood flow (Kazmi et al., 2015; Ghanizada et al., 2020a). Upon CGRP infusion at T120 min facial skin blood flow increased on both days.
