About the Authors

Si-Young Park

Contributed equally to this work with: Si-Young Park, Yong-Kyu Park

Affiliation Department of Family Medicine, Eulji University College of Medicine, Daejeon, South Korea

Yong-Kyu Park

Contributed equally to this work with: Si-Young Park, Yong-Kyu Park

Affiliation Department of Medical Statistics, Catholic University College of Medicine, Seoul, South Korea

Kyung-Hwan Cho

Affiliation Department of Family Medicine, Korea University College of Medicine, Seoul, South Korea

Hee-Jeong Choi

Affiliation Department of Family Medicine, Eulji University College of Medicine, Daejeon, South Korea

Jee-Hye Han

Affiliation Department of Family Medicine, Eulji University College of Medicine, Daejeon, South Korea

Kyung-Do Han

Affiliation Department of Medical Statistics, Catholic University College of Medicine, Seoul, South Korea

Byung-Duck Han

Affiliation Department of Family Medicine, Korea University College of Medicine, Seoul, South Korea

Yeo-Joon Yoon

Affiliation Department of Family Medicine, Korea University College of Medicine, Seoul, South Korea

Yang-Hyun Kim

mrchir@naver.com

Affiliation Department of Family Medicine, Korea University College of Medicine, Seoul, South Korea

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SYP YKP YHK. Performed the experiments: HJC JHH. Analyzed the data: YKP KDH KHC. Contributed reagents/materials/analysis tools: BDH YJY. Wrote the paper: SYP YKP YHK.