Funding for this research was provided by:
Korea National Research Foundation (NRF-2019R1A6A3A01091838, NRF-2019R1A2B5B01101143)
Korea National Research Foundation (NRF-2017R1A2B2004651)
Korean Health Technology R&D Project, Ministry of Health & Welfare (HG18C0080)
Article History
Received: 28 February 2020
Accepted: 17 May 2020
First Online: 5 June 2020
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.