Authors’ contributions
Kazuhiro Hiyama made substantial contributions to the data acquisition
and the study conception, design, and interpretation. He was also
involved in the initial drafting of the manuscript and critically
revising the final manuscript.
The other authors were involved in revising the final manuscript. All of
the authors have reviewed the final manuscript and gave their approval
to the version to be published. In addition, they agree to be
accountable for all aspects of the work, including for ensuring that
questions related to the accuracy or integrity of any part of the work
are appropriately investigated and resolved.