Author Contributions: Mr Kim and Dr Nakagawa had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Kim, Horn, Pharis, and Nakagawa. Acquisition of data: Kim, Pharis, Kincannon, Jones, O’Bryan, Myers, and Nakagawa. Analysis and interpretation of data: Kim, Horn, and Nakagawa. Drafting of the manuscript: Kim, Horn, and Nakagawa. Critical revision of the manuscript for important intellectual content: Kim, Pharis, Kincannon, Jones, O’Bryan, Myers, and Nakagawa. Obtained funding: Nakagawa. Administrative, technical, and material support: Kim, Horn, Pharis, Jones, O’Bryan, and Myers. Study supervision: Horn, Kincannon, and Nakagawa.