Author contributions
Akira Yoneda involved in case identification, writing, review and editing the manuscript. Taiji Hida, Hanako Tetsuo, Saeko Fukui, Shunsuke Murakami, Takayuki Miyoshi, Tatsuya Okamoto, Amane Kitasato and Hiroaki Takeshita involved in review, writing, and editing the manuscript. Tamotsu Kuroki involved in supervision of the study.