Accepted for Publication: November 16, 2011.
Author Contributions:Study concept and design: Adachi. Acquisition of data: Adachi. Analysis and interpretation of data: Adachi and Minami. Drafting of the manuscript: Adachi. Critical revision of the manuscript for important intellectual content: Adachi and Minami. Administrative, technical, and material support: Minami. Study supervision: Adachi and Minami.
Conflict of Interest Disclosures: None reported.
Additional Contributions: Kazuaki Enatsu, MD, PhD, provided expertise in pathologic diagnosis and interpretation.