Copyright Transfer Agreement

We the undersigned authors have all made significant contributions to this manuscript and agree to its submission to the Ewha Medical Journal and, if accepted, to its publication therein. We also transfer all copyright ownership of the manuscript referenced above to the Ewha Medical Journal, in the event the work is published. We warrant that this article is original, does not infringe on any copyright or other proprietary right of any third party, is not under consideration by another journal and has not been published previously. Ethical approval has been sought and obtained as necessary and any conflicts of interest are stated.