About the Authors

Sue Kim

Affiliation Department of Family Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea

Ji-Young Kim

Affiliation Department of Sport and Leisure Studies, Yonsei University, Seoul, Korea

Duk-Chul Lee

Affiliation Department of Family Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea

Hye-Sun Lee

Affiliation Biostatistics Collaboration Units, Department of Research Affairs, Yonsei University College of Medicine, Seoul, Korea

Ji-Won Lee

indi5645@yuhs.ac (JWL); jjeon@yonsei.ac.kr (JYJ)

Affiliation Department of Family Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea

Justin Y. Jeon

indi5645@yuhs.ac (JWL); jjeon@yonsei.ac.kr (JYJ)

Affiliation Department of Sport and Leisure Studies, Yonsei University, Seoul, Korea

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SK JYK JWL JYJ. Performed the experiments: SK JYK JWL JYJ. Analyzed the data: SK DCL HSL. Contributed reagents/materials/analysis tools: DCL JWL JYJ. Wrote the paper: SK JYK.