Text and Data Mining valid from 2019-05-16
Received: 20 January 2019
Accepted: 7 May 2019
First Online: 16 May 2019
Ethics approval and consent to participate
: The study protocol complied with the Helsinki Declaration standards and was approved by the Ethical Committee of Nagoya Kyoritsu Hospital (Approval No. K094–03). The requirement of written informed consent was waived as this study used retrospective data.
: Written informed consent was not obtained for the publication of Fig. InternalRef removed because the image is entirely unidentifiable and there are no details on individuals reported within the manuscript.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.