Article History
Received: 8 April 2019
Accepted: 29 July 2019
First Online: 7 August 2019
Ethics approval and consent to participate
: After obtaining approval from the Myungji Hospital Institutional Review Board (IRB number: 4–2008-0583), the study was performed in Kwandong University Muyngji Hospital. Written informed consent was obtained from all subjects participating in the trial.
: Not applicable
: The authors declare that they have no competing interest.