Text and Data Mining valid from 2020-01-14
Received: 18 August 2019
Revised: 20 October 2019
Accepted: 19 November 2019
First Online: 14 January 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The study was conducted with the approval of the institutional review board of Tokyo Neurological Center and Matsui Hospital. All participants provided written consent to participate in the study. All rights of the patients were protected against any kind of disadvantage and individual matters.
: Not applicable. We are permitted to reproduce copyrighted materials.