Funding for this research was provided by:
Soonchunhyang University (Not applicable)
Article History
Received: 26 October 2019
Accepted: 14 January 2020
First Online: 17 January 2020
Ethics approval and consent to participate
: Not applicable.
: The subject gave written informed consent for the publication of any associated data and accompanying images.
: Kyum-Yil Kwon is an associate editor of BMC Neurology.Other authors declare that they have no competing interests.