Tsuyoshi Harada, Tetsuya Tsuji, Junya Ueno, Yu Koishihara, Nobuko Konishi, Nanako Hijikata, Aiko Ishikawa, Daisuke Kotani, Takashi Kojima, Hisashi Fujiwara, and Takeo Fujita declare no potential conflicts of interest with regard to the research, authorship, or publication of this article.