Funding for this research was provided by:
Ministry of Health, Labour and Welfare (09158492)
National Center of Neurological and Psychiatry (29-2)
Received: 26 May 2020
Accepted: 24 July 2020
First Online: 31 July 2020
Ethics approval and consent to participate
: The protocol was approved by the Institutional Ethics Committees of the University of Tokyo , the National Center of Neurology and Psychiatry [A2011–090] and International University of Health and Welfare [13-Io-180], and written informed consent was obtained from all subjects prior to enrollment in the study.
: Not applicable.
: The authors declare that they have no competing interests.