Irimia P, González-Redondo R, Domínguez P D, Díez-Valle R, Martínez-Vila E
Department of Neurology and Neurosurgery, Clínica Universidad de Navarra, Pamplona, Spain.
Cephalalgia. 2010 May;30(5):626-30. doi: 10.1111/j.1468-2982.2009.01943.x. Epub 2010 Feb 22.