Funding for this research was provided by:
Hanyang University (HY-2019)
Text and Data Mining valid from 2019-11-08
Received: 9 May 2019
Accepted: 23 October 2019
First Online: 8 November 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of EUSOM (EUIRB2018–101). The Institutional Review Board waived the need for explicit consent from participants.
: Not applicable.
: The authors declare that they have no competing interests.