404. That’s an error.

The requested URL /web/20180712185522/https://www.qualitymeasures.ahrq.gov/search?f_ICD9CM_CUI=C0375239&fLockTerm=Migraine%2C+unspecified%2C+without+mention+of+intractable+migraine+without+mention+of+status+migrainosus was not found on this server. That’s all we know.