Funding for this research was provided by:
National Research Foundation (2016R1D1A1B03934948)
Article History
Received: 14 June 2019
Accepted: 19 May 2020
First Online: 11 July 2020
Ethics approval and consent to participate
: This study was approved by Yonsei University Health System’s Institutional Review Board (no. Y-2018-0070). Written, informed consent was voluntarily provided by all participants. The participants were free to withdraw at any time. Researchers assured participants that the collected data would be used solely for this research purpose. To protect participants’ personal information, the questionnaires were assigned an identification number and stored separately from the informed consent documents.
: Not applicable.
: The authors declare that they have no competing interests.