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The order in which the authors was listed was incorrect. The authorship line should have appeared as follows.

Se-Heon Kim, Sei Young Lee, Haeng Ran Park, Ji Min Sung, Ae Ran Park, Suki Kang, Baek Gil Kim, Yoon Pyo Choi, Yong-Bae Kim, Nam Hoon Cho.

The authors regret this error.