Lee, Hyo Kyung
Kim, Mee Kum http://orcid.org/0000-0001-7850-6894
Article History
Received: 27 June 2018
Accepted: 9 October 2018
First Online: 19 October 2018
Ethics approval and consent to participate
: The protocol of this study adhered to the tenets of the Declaration of Helsinki and was approved by our Institutional Review and Ethics Board (No. 1684–174-790).
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.