Analgesic overuse among subjects with headache, neck, and low-back pain

Zwart, J. A., Dyb, G., Hagen, K., Svebak, S., Stovner, L. J., & Holmen, J. (2004). Analgesic overuse among subjects with headache, neck, and low-back pain. Neurology, 62, 1540-1544.