Fig. 1From: Consistent effects of non-invasive vagus nerve stimulation (nVNS) for the acute treatment of migraine: additional findings from the randomized, sham-controlled, double-blind PRESTO trialPRESTO study design (a) and treatment protocol (b). Abbreviations: L, left; nVNS, non-invasive vagus nerve stimulation; R, right; Stim, stimulation; Tx, treatmentBack to article page