Debate: analgesic overuse is a cause, not consequence, of chronic daily headache. Analgesic overuse is a cause of chronic daily headache.

Tepper SJ. Debate: analgesic overuse is a cause, not consequence, of chronic daily headache. Analgesic overuse is a cause of chronic daily headache. Headache. 2002 Jun; 42(6):543-7.

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