Conception and design: Gonzalez, Buchanan. Acquisition of data: all authors. Analysis and interpretation of data: Gonzalez, Dye. Drafting the article: Dye, Buchanan. Critically revising the article: all authors. Reviewed submitted version of manuscript: all authors. Approved the final version of the manuscript on behalf of all authors: Gonzalez. Administrative/technical/material support: Gonzalez. Study supervision: Gonzalez.
Portions of this work were presented in poster form at the Society of Neurointerventional Surgery International Endovascular Stroke Conference and Joint Cerebrovascular Section Annual Meeting, Honolulu, Hawaii, February 4, 2013.