Text and Data Mining valid from 2019-12-01
Received: 15 April 2019
Accepted: 26 November 2019
First Online: 11 December 2019
Ethics approval and consent to participate
: This study has been approved by the Chonnam National University Hospital Institutional Review Board (IRB No. CNUH–EXP–2018–042).
: Not applicable.
: The authors declare that they have no competing interests.