The Nord-Trøndelag Health Study shows increased prevalence of primary recurrent headaches among adolescents over a four-year period

Jacobsena, B. A., Dyb, G., Hagen, K., Stovner, L. J., Holmen, T. L., & Zwart, J. A. (2011). The Nord-Trøndelag Health Study shows increased prevalence of primary recurrent headaches among adolescents over a four-year period. Scandinavian Journal of Pain, 2(3), 148-152. doi:10.1016/j.sjpain.2011.03.002