Authors’ contributions
Ken Haruma: conception and design, data analysis and interpretation, drafting and revision of the manuscript. Naomi Uemura: conception and design, collection and assembly of data, data analysis and interpretation, drafting and revision of the manuscript. Yoshikazu Kinoshita: conception and design, collection and assembly of data, data analysis and interpretation, and revision of the manuscript. Takashi Yao: conception and design, data analysis and interpretation, and revision of the manuscript. Ryoji Kushima: conception and design, data analysis and interpretation, and revision of the manuscript. Junichi Akiyama: collection and assembly of data, data analysis and interpretation, and revision of the manuscript. Nobuo Aoyama: collection and assembly of data, and revision of the manuscript. Tatsuhiro Kanoo: conception and design, and revision of the manuscript. Kouji Miyata: data analysis and interpretation, drafting and revision of the manuscript. Naomi Kusumoto: data analysis and interpretation, drafting and revision of the manuscript. All authors critically appraised the final manuscript. All authors gave final approval of the version to be published and agreed to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.