Funding for this research was provided by:
The Original Technology Research Program for Brain Science through the National Research Foundation of Korea (NRF) funded by the Korean government (2014M3C7A1064752)
The National Research Foundation of Korea (NRF) grant funded by the Korea governmen (NRF- 2018R1A1A3A04079255)
A grant of the Korean Health Technology R&D Project, Ministry of Health & Welfare, Republic of Korea (HI18C1629 and HI18C0335)
Received: 27 August 2019
Accepted: 23 December 2019
First Online: 4 January 2020
Ethics approval and consent to participate
: The Institutional Review Boards approved this study at all participating centers. We obtained written, informed consent from patients and caregivers.
: Not applicable.
: The authors declare that they have no competing interests.