Conception and design: Ostrem. Acquisition of data: Kilbane, Ramirez-Zamora, Ryapolova-Webb, Qasim, Glass, Starr. Analysis and interpretation of data: Ostrem, Kilbane, Ramirez-Zamora, Starr. Drafting the article: Kilbane, Ramirez-Zamora. Critically revising the article: Ostrem, Ryapolova-Webb, Qasim, Glass, Starr. Reviewed submitted version of manuscript: Ostrem, Glass, Starr. Approved the final version of the manuscript on behalf of all authors: Ostrem. Statistical analysis: Kilbane, Ramirez-Zamora, Ryapolova-Webb, Qasim, Glass, Starr.
Part of this work was previously presented in poster form at the American Society for Stereotactic and Functional Neurosurgery in San Francisco, California, in May 2012.