Text and Data Mining valid from 2018-11-01
Received: 1 June 2017
Accepted: 10 October 2018
First Online: 1 November 2018
Ethics approval and consent to participate
: Ethical approval was obtained from the Institutional Review Board of Ewha University Medical Center (Approval number : EUMC 16-05-032-005). Consent for participation from patients were waived from the Institutional Review Board since this was an observational retrospective study.
: Written consent for publish of X rays were obtained from the patient.
: The authors declare that they have no competing interests.
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