Conception and design: Longatti. Acquisition of data: Feletti, Basaldella, Fiorindi, De Caro. Analysis and interpretation of data: Feletti, Longatti, Porzionato. Drafting the article: Feletti, Longatti, Porzionato. Critically revising the article: Feletti, Longatti, Porzionato, Basaldella, Fiorindi. Reviewed submitted version of manuscript: all authors. Approved the final version of the manuscript on behalf of all authors: Feletti. Study supervision: Longatti.
Portions of this work were presented in poster form at the 82nd AANS 2014 Annual Scientific Meeting, San Francisco, California, April 5–9, 2014.