Funding for this research was provided by:
National Rehabilitation Center (800-20180055)
Text and Data Mining valid from 2019-07-08
Received: 11 January 2019
Accepted: 3 July 2019
First Online: 8 July 2019
Ethics approval and consent to participate
: All of the procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Ethical approval was obtained from the Seoul National University Hospital Institutional Review Board (IRB) No. 1801–072-916. All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.