Table 2.
Advantages | Limitations |
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Abbreviations: IHS, International Headache Society; PICO, population, intervention, comparison, outcome; RCT, randomized control trial; VAS, visual analog scale; HIT-6, headache impact test 6; MIDAS, migraine disability assessment; IMMPACT, initiative on methods, measurement, and pain assessment in clinical trials; RAPD, relative afferent pupillary defect; MOH, medication overuse headache.