Author Contributions:
Yasuyuki Asada: Conception and design of study, acquisition of data,
analysis and/or interpretation of data, Drafting the manuscript
Chitoshi Teramura: Conception and design of study, acquisition of data,
analysis and/or interpretation of data, Drafting the manuscript
Takuma Wada: acquisition of data
Yoshisato Machida: analysis and/or interpretation of data
Shinya Koshinuma: revising the manuscript critically for important
intellectual content
Gaku Yamamoto: Conception and design of study, revising the manuscript
critically for important intellectual content
All authors critically revised the report, commented on drafts of the
manuscript, and approved the final report.