Accepted for Publication: December 3, 2010.
Author Contributions: Dr Uhara had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Uhara. Acquisition of data: Uhara and Kamijo. Analysis and interpretation of data: Uhara, Okuyama, and Saida. Drafting of the manuscript: Uhara and Saida. Critical revision of the manuscript for important intellectual content: Uhara, Kamijo, Okuyama, and Saida. Statistical analysis: Uhara. Obtained funding: Uhara. Administrative, technical, and material support: Uhara and Kamijo. Study supervision: Uhara, Okuyama, and Saida.
Financial Disclosure:: None reported.