Text and Data Mining valid from 2018-11-13
Received: 1 August 2018
Accepted: 1 November 2018
First Online: 13 November 2018
Ethics approval and consent to participate
: This study was approved by the Human Research Ethics Committee of the School of Rehabilitation Sciences, Health Sciences University of Hokkaido (Authorization number, 16R031030).
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.