Text and Data Mining valid from 2019-07-05
Received: 23 August 2018
Accepted: 24 June 2019
First Online: 5 July 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board (IRB) of Ajou University Hospital (Ethics consent No. AJIRB-SBR-SUR-18-069). Consent forms were obtained from all survey participants.
: Not applicable.
: The authors declare that they have no competing interests.