Diagnostic criteria:
A. Any headache fulfilling criterion C
B. Calcitonin gene-related peptide (CGRP) has been administered
C. Evidence of causation demonstrated by all of the following:
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1. headache has developed within 1 hr of CGRP absorption
2. headache has resolved within 1 hr after absorption of CGRP has ceased
3. headache has at least one of the following four characteristics:
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a) bilateral
b) mild to moderate intensity
c) pulsating quality
d) aggravated by physical activity
D. Not better accounted for by another ICHD-3 diagnosis.