Patent foramen ovale closure for stroke prevention: A myriad of unanswered questionsByAlex Abou-Chebl, MD, is director of neurointerventional services, University of Louisville Hospital,director of vascular,interventional neurology fellowships, associate professor of neuroloSeptember 26th 2008Migraines, including those with aura, are common and generally benign, affecting between 10% and 15% of the population.