Funding for this research was provided by:
by a grant from the Korea Health Technology R and D Project through the Korea Health Industry Development Institute, funded by the Ministry of Health and Welfare, Republic of Korea (HI14C1324)
Article History
Received: 1 February 2020
Revised: 9 March 2020
Accepted: 16 April 2020
First Online: 4 May 2020
Compliance with ethical standards
:
: None.
: This study was approved by the institutional Review Board (IRB) of Severance Hospital (<b>4–2019-0695</b>).
: The patient’s written informed consent was waived by the approving IRB, as this was a retrospective study.