Author Contributions: Study concept and design: Shimohata, Onodera, and Nishizawa. Acquisition of data: Shimohata, Shinoda, Nakayama, Yoshizawa, Matsuzawa, Naruse, Takahashi, and Gejyo. Analysis and interpretation of data: Shimohata, Ozawa, Terajima, Tanaka, and Nishizawa. Drafting of the manuscript: Shimohata, Ozawa, and Nishizawa. Critical revision of the manuscript for important intellectual content: Shimohata, Shinoda, Nakayama, Terajima, Yoshizawa, Matsuzawa, Onodera, Naruse, Tanaka, Takahashi, Gejyo, and Nishizawa. Obtained funding: Nishizawa. Administrative, technical, and material support: Nakayama and Nishizawa. Study supervision: Ozawa, Yoshizawa, Onodera, Tanaka, Gejyo, and Nishizawa.