Takahashi, Kensho
Kato, Kenji
Mizuguchi, Nobuaki
Ushiba, Junichi
Article History
Received: 10 November 2017
Accepted: 18 October 2018
First Online: 1 November 2018
Ethics approval and consent to participate
: This study was conducted according to the Declaration of Helsinki. The experimental procedures were approved by the ethics committee of the Faculty of Science and Technology, Keio University. Written informed consent was obtained from all participants prior to the experiments.
: We obtained written consent to publish the data from all participants prior to the experiments.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.