Text and Data Mining valid from 2019-07-02
Received: 15 March 2019
Accepted: 20 June 2019
First Online: 2 July 2019
Ethics approval and consent to participate
: The current study was approved by the Institutional Review Board at the Seoul National University Hospital (IRB number: H-1502-026-647). Because we used only recorded medical data without any intervention, the IRB at our center approved the study and waived the requirement for informed consent.
: Not applicable.
: Hyung-Min Kwon is an editorial board member of BMC Neurology.