Conception and design: Härtl, Alimi, Hofstetter, Pyo. Acquisition of data: Alimi, Paulo. Analysis and interpretation of data: Härtl, Alimi, Hofstetter. Drafting the article: Alimi. Critically revising the article: all authors. Reviewed submitted version of manuscript: all authors. Statistical analysis: Alimi, Hofstetter. Study supervision: Härtl.
Portions of this work were presented in abstract/poster form at the 29th Annual Meeting of the AANS/CNS Section on Disorders of the Spine and Peripheral Nerves held in Phoenix, Arizona, on March 6–9, 2013.
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