Funding for this research was provided by:
NRF, Korea (NRF-2017R1A2B2002136)
Received: 26 November 2018
Accepted: 16 October 2019
First Online: 13 December 2019
Ethics approval and consent to participate
: This study protocol was approved by the ethics committee of the Samsung Medical Center and Busan Paik Hospital.
: The authors declare that they have no competing interests.