Funding for this research was provided by:
Hallym University Medical Center (HURF-2017-47)
Text and Data Mining valid from 2018-07-18
Received: 15 March 2018
Accepted: 21 June 2018
First Online: 18 July 2018
Ethics approval and consent to participate
: This study was approved by the Hallym University Kangnam Sacred Heart Hospital Institutional Review Board (IRB number: HUKSHH IRB 2017–10-010). Informed consent was waivered by the above IRB as the present retrospective cohort study involved already existing data and records at the time of investigation, and did not retain personal identifiers of the gathered information.
: Not applicable.
: The authors declare that they have no competing interests.
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