Author Contributions
Hiroshi Kurazumi: Data analysis, Drafting article,
Akihito Mikamo, Takayuki Okamura: Concept/design
Ryo Suzuki, Bungo Shirasawa, Yosuke Miyazaki, Hiroki Tateishi, Tetsuro
Oda: Data collection
Masafumi Yano, Kimikazu Hamano: Approval of article