Accepted for Publication: November 28, 2012.
Author Contributions:Study concept and design: Grover and Merritt. Acquisition of data: Grover and Merritt. Analysis and interpretation of data: All authors. Drafting of the manuscript: Grover and Merritt. Critical revision of the manuscript for important intellectual content: All authors. Statistical analysis: Grover. Administrative, technical, and material support: All authors. Study supervision: Merritt.
Conflict of Interest Disclosures: None reported.
Online-Only Material: The video is available .
Additional Contributions: We thank Alexandra B. Hernandez, Gory Details Illustration, for providing the illustrations in figures 1-3.