AUTHOR CONTRIBUTIONS
Y. Yeo, H. Lee, J. Ryu, and J-Y. Moon were involved in study design. Y.
Yeo, H. Lee, J. Ryu, S-H Kim, and J-Y. Moon were involved in data
analysis. Y. Yeo, H. Lee, J. Ryu, and J-Y. Moon were involved in writing
the manuscript. All authors were involved in reviewing and revising the
manuscript.